diff --git a/x-pack/plugin/eql/qa/common/src/main/resources/additional_test_queries.toml b/x-pack/plugin/eql/qa/common/src/main/resources/additional_test_queries.toml
index 703ae49817b4e..676e2809d8e29 100644
--- a/x-pack/plugin/eql/qa/common/src/main/resources/additional_test_queries.toml
+++ b/x-pack/plugin/eql/qa/common/src/main/resources/additional_test_queries.toml
@@ -326,3 +326,32 @@ query = '''
 file where wildcard(file_name, "winini?.exe", "lsass.e?e") and opcode == 2
 '''
 expected_event_ids  = [65, 86]
+
+[[queries]]
+name = "insensitiveInSingleArg"
+query = 'process where string(serial_event_id) in~ ("1")'
+expected_event_ids  = [1]
+
+[[queries]]
+name = "insensitiveInSingleArgPatternVerbatimMatch"
+query = 'process where string(serial_event_id) in~ ("1*")'
+expected_event_ids  = []
+
+[[queries]]
+name = "insensitiveInSingleArgPatternQuestionMarkVerbatimMatch"
+query = 'process where string(serial_event_id) in~ ("1?")'
+expected_event_ids  = []
+
+[[queries]]
+name = "insensitiveInMultipleArgs"
+query = '''
+file where file_name in~ ("wininit.exe", "lsass.exe") and opcode == 2
+'''
+expected_event_ids  = [65, 86]
+
+[[queries]]
+name = "insensitiveMultipleArgsWildcardPatternVerbatimMatch"
+query = '''
+file where file_name in~ ("winini*.exe", "lsass.e?e") and opcode == 2
+'''
+expected_event_ids  = []
diff --git a/x-pack/plugin/eql/src/main/antlr/EqlBase.g4 b/x-pack/plugin/eql/src/main/antlr/EqlBase.g4
index ba41ba1aab39c..717eddb74a070 100644
--- a/x-pack/plugin/eql/src/main/antlr/EqlBase.g4
+++ b/x-pack/plugin/eql/src/main/antlr/EqlBase.g4
@@ -99,7 +99,7 @@ operatorExpression
 //   https://github.com/antlr/antlr4/issues/780
 //   https://github.com/antlr/antlr4/issues/781
 predicate
-    : NOT? kind=IN LP expression (COMMA expression)* RP
+    : NOT? kind=(IN | IN_INSENSITIVE) LP expression (COMMA expression)* RP
     | kind=SEQ constant
     | kind=SEQ LP constant (COMMA constant)* RP
     ;
@@ -162,6 +162,7 @@ ANY: 'any';
 BY: 'by';
 FALSE: 'false';
 IN: 'in';
+IN_INSENSITIVE : 'in~';
 JOIN: 'join';
 MAXSPAN: 'maxspan';
 NOT: 'not';
diff --git a/x-pack/plugin/eql/src/main/antlr/EqlBase.tokens b/x-pack/plugin/eql/src/main/antlr/EqlBase.tokens
index 236d512cbd52d..340235c4d3380 100644
--- a/x-pack/plugin/eql/src/main/antlr/EqlBase.tokens
+++ b/x-pack/plugin/eql/src/main/antlr/EqlBase.tokens
@@ -3,79 +3,81 @@ ANY=2
 BY=3
 FALSE=4
 IN=5
-JOIN=6
-MAXSPAN=7
-NOT=8
-NULL=9
-OF=10
-OR=11
-SEQUENCE=12
-TRUE=13
-UNTIL=14
-WHERE=15
-WITH=16
-SEQ=17
-ASGN=18
-EQ=19
-NEQ=20
-LT=21
-LTE=22
-GT=23
-GTE=24
-PLUS=25
-MINUS=26
-ASTERISK=27
-SLASH=28
-PERCENT=29
-DOT=30
-COMMA=31
-LB=32
-RB=33
-LP=34
-RP=35
-PIPE=36
-STRING=37
-INTEGER_VALUE=38
-DECIMAL_VALUE=39
-IDENTIFIER=40
-QUOTED_IDENTIFIER=41
-TILDE_IDENTIFIER=42
-LINE_COMMENT=43
-BRACKETED_COMMENT=44
-WS=45
+IN_INSENSITIVE=6
+JOIN=7
+MAXSPAN=8
+NOT=9
+NULL=10
+OF=11
+OR=12
+SEQUENCE=13
+TRUE=14
+UNTIL=15
+WHERE=16
+WITH=17
+SEQ=18
+ASGN=19
+EQ=20
+NEQ=21
+LT=22
+LTE=23
+GT=24
+GTE=25
+PLUS=26
+MINUS=27
+ASTERISK=28
+SLASH=29
+PERCENT=30
+DOT=31
+COMMA=32
+LB=33
+RB=34
+LP=35
+RP=36
+PIPE=37
+STRING=38
+INTEGER_VALUE=39
+DECIMAL_VALUE=40
+IDENTIFIER=41
+QUOTED_IDENTIFIER=42
+TILDE_IDENTIFIER=43
+LINE_COMMENT=44
+BRACKETED_COMMENT=45
+WS=46
 'and'=1
 'any'=2
 'by'=3
 'false'=4
 'in'=5
-'join'=6
-'maxspan'=7
-'not'=8
-'null'=9
-'of'=10
-'or'=11
-'sequence'=12
-'true'=13
-'until'=14
-'where'=15
-'with'=16
-':'=17
-'='=18
-'=='=19
-'!='=20
-'<'=21
-'<='=22
-'>'=23
-'>='=24
-'+'=25
-'-'=26
-'*'=27
-'/'=28
-'%'=29
-'.'=30
-','=31
-'['=32
-']'=33
-'('=34
-')'=35
-'|'=36
+'in~'=6
+'join'=7
+'maxspan'=8
+'not'=9
+'null'=10
+'of'=11
+'or'=12
+'sequence'=13
+'true'=14
+'until'=15
+'where'=16
+'with'=17
+':'=18
+'='=19
+'=='=20
+'!='=21
+'<'=22
+'<='=23
+'>'=24
+'>='=25
+'+'=26
+'-'=27
+'*'=28
+'/'=29
+'%'=30
+'.'=31
+','=32
+'['=33
+']'=34
+'('=35
+')'=36
+'|'=37
diff --git a/x-pack/plugin/eql/src/main/antlr/EqlBaseLexer.tokens b/x-pack/plugin/eql/src/main/antlr/EqlBaseLexer.tokens
index 236d512cbd52d..340235c4d3380 100644
--- a/x-pack/plugin/eql/src/main/antlr/EqlBaseLexer.tokens
+++ b/x-pack/plugin/eql/src/main/antlr/EqlBaseLexer.tokens
@@ -3,79 +3,81 @@ ANY=2
 BY=3
 FALSE=4
 IN=5
-JOIN=6
-MAXSPAN=7
-NOT=8
-NULL=9
-OF=10
-OR=11
-SEQUENCE=12
-TRUE=13
-UNTIL=14
-WHERE=15
-WITH=16
-SEQ=17
-ASGN=18
-EQ=19
-NEQ=20
-LT=21
-LTE=22
-GT=23
-GTE=24
-PLUS=25
-MINUS=26
-ASTERISK=27
-SLASH=28
-PERCENT=29
-DOT=30
-COMMA=31
-LB=32
-RB=33
-LP=34
-RP=35
-PIPE=36
-STRING=37
-INTEGER_VALUE=38
-DECIMAL_VALUE=39
-IDENTIFIER=40
-QUOTED_IDENTIFIER=41
-TILDE_IDENTIFIER=42
-LINE_COMMENT=43
-BRACKETED_COMMENT=44
-WS=45
+IN_INSENSITIVE=6
+JOIN=7
+MAXSPAN=8
+NOT=9
+NULL=10
+OF=11
+OR=12
+SEQUENCE=13
+TRUE=14
+UNTIL=15
+WHERE=16
+WITH=17
+SEQ=18
+ASGN=19
+EQ=20
+NEQ=21
+LT=22
+LTE=23
+GT=24
+GTE=25
+PLUS=26
+MINUS=27
+ASTERISK=28
+SLASH=29
+PERCENT=30
+DOT=31
+COMMA=32
+LB=33
+RB=34
+LP=35
+RP=36
+PIPE=37
+STRING=38
+INTEGER_VALUE=39
+DECIMAL_VALUE=40
+IDENTIFIER=41
+QUOTED_IDENTIFIER=42
+TILDE_IDENTIFIER=43
+LINE_COMMENT=44
+BRACKETED_COMMENT=45
+WS=46
 'and'=1
 'any'=2
 'by'=3
 'false'=4
 'in'=5
-'join'=6
-'maxspan'=7
-'not'=8
-'null'=9
-'of'=10
-'or'=11
-'sequence'=12
-'true'=13
-'until'=14
-'where'=15
-'with'=16
-':'=17
-'='=18
-'=='=19
-'!='=20
-'<'=21
-'<='=22
-'>'=23
-'>='=24
-'+'=25
-'-'=26
-'*'=27
-'/'=28
-'%'=29
-'.'=30
-','=31
-'['=32
-']'=33
-'('=34
-')'=35
-'|'=36
+'in~'=6
+'join'=7
+'maxspan'=8
+'not'=9
+'null'=10
+'of'=11
+'or'=12
+'sequence'=13
+'true'=14
+'until'=15
+'where'=16
+'with'=17
+':'=18
+'='=19
+'=='=20
+'!='=21
+'<'=22
+'<='=23
+'>'=24
+'>='=25
+'+'=26
+'-'=27
+'*'=28
+'/'=29
+'%'=30
+'.'=31
+','=32
+'['=33
+']'=34
+'('=35
+')'=36
+'|'=37
diff --git a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveEquals.java b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveEquals.java
index 2d233bf5e2241..e2724b5d6451b 100644
--- a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveEquals.java
+++ b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveEquals.java
@@ -8,7 +8,6 @@
 
 import org.elasticsearch.xpack.ql.expression.Expression;
 import org.elasticsearch.xpack.ql.expression.predicate.Negatable;
-import org.elasticsearch.xpack.ql.expression.predicate.operator.comparison.BinaryComparisonProcessor.BinaryComparisonOperation;
 import org.elasticsearch.xpack.ql.tree.NodeInfo;
 import org.elasticsearch.xpack.ql.tree.Source;
 
@@ -16,10 +15,6 @@
 
 public class InsensitiveEquals extends InsensitiveBinaryComparison implements Negatable<InsensitiveBinaryComparison> {
 
-    public InsensitiveEquals(Source source, Expression left, Expression right) {
-        this(source, left, right, null);
-    }
-
     public InsensitiveEquals(Source source, Expression left, Expression right, ZoneId zoneId) {
         super(source, left, right, InsensitiveBinaryComparisonProcessor.InsensitiveBinaryComparisonOperation.SEQ, zoneId);
     }
@@ -46,6 +41,6 @@ public InsensitiveBinaryComparison negate() {
 
     @Override
     protected String regularOperatorSymbol() {
-        return BinaryComparisonOperation.EQ.symbol();
+        return "in";
     }
 }
diff --git a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveNotEquals.java b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveNotEquals.java
index 192e2a91be41a..c6eb1ebd656de 100644
--- a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveNotEquals.java
+++ b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveNotEquals.java
@@ -8,14 +8,11 @@
 
 import org.elasticsearch.xpack.ql.expression.Expression;
 import org.elasticsearch.xpack.ql.expression.predicate.Negatable;
-import org.elasticsearch.xpack.ql.expression.predicate.operator.comparison.BinaryComparisonProcessor.BinaryComparisonOperation;
 import org.elasticsearch.xpack.ql.tree.NodeInfo;
 import org.elasticsearch.xpack.ql.tree.Source;
 
 import java.time.ZoneId;
 
-;
-
 public class InsensitiveNotEquals extends InsensitiveBinaryComparison implements Negatable<InsensitiveBinaryComparison> {
 
     public InsensitiveNotEquals(Source source, Expression left, Expression right, ZoneId zoneId) {
@@ -44,7 +41,7 @@ public InsensitiveBinaryComparison negate() {
 
     @Override
     protected String regularOperatorSymbol() {
-        return BinaryComparisonOperation.NEQ.symbol();
+        return "not in";
     }
 }
 
diff --git a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveWildcardEquals.java b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveWildcardEquals.java
new file mode 100644
index 0000000000000..6b91919c15ebd
--- /dev/null
+++ b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveWildcardEquals.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+package org.elasticsearch.xpack.eql.expression.predicate.operator.comparison;
+
+import org.elasticsearch.xpack.ql.expression.Expression;
+import org.elasticsearch.xpack.ql.expression.predicate.operator.comparison.BinaryComparisonProcessor;
+import org.elasticsearch.xpack.ql.tree.NodeInfo;
+import org.elasticsearch.xpack.ql.tree.Source;
+
+import java.time.ZoneId;
+
+/**
+ * Variant of insensitive equality that understands wildcard patterns (*, !).
+ * Should be replaced by the optimizer in case of the wildcard pattern, otherwise behaves just like its parent.
+ */
+public class InsensitiveWildcardEquals extends InsensitiveEquals {
+
+    public InsensitiveWildcardEquals(Source source, Expression left, Expression right, ZoneId zoneId) {
+        super(source, left, right, zoneId);
+    }
+
+    @Override
+    protected NodeInfo<InsensitiveEquals> info() {
+        return NodeInfo.create(this, InsensitiveWildcardEquals::new, left(), right(), zoneId());
+    }
+
+    @Override
+    protected InsensitiveWildcardEquals replaceChildren(Expression newLeft, Expression newRight) {
+        return new InsensitiveWildcardEquals(source(), newLeft, newRight, zoneId());
+    }
+
+    @Override
+    public InsensitiveWildcardEquals swapLeftAndRight() {
+        return new InsensitiveWildcardEquals(source(), right(), left(), zoneId());
+    }
+
+    @Override
+    public InsensitiveBinaryComparison negate() {
+        return new InsensitiveWildcardNotEquals(source(), left(), right(), zoneId());
+    }
+
+    @Override
+    protected String regularOperatorSymbol() {
+        return BinaryComparisonProcessor.BinaryComparisonOperation.EQ.symbol();
+    }
+}
diff --git a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveWildcardNotEquals.java b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveWildcardNotEquals.java
new file mode 100644
index 0000000000000..1113fd79fa980
--- /dev/null
+++ b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/expression/predicate/operator/comparison/InsensitiveWildcardNotEquals.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+package org.elasticsearch.xpack.eql.expression.predicate.operator.comparison;
+
+import org.elasticsearch.xpack.ql.expression.Expression;
+import org.elasticsearch.xpack.ql.expression.predicate.operator.comparison.BinaryComparisonProcessor;
+import org.elasticsearch.xpack.ql.tree.NodeInfo;
+import org.elasticsearch.xpack.ql.tree.Source;
+
+import java.time.ZoneId;
+
+public class InsensitiveWildcardNotEquals extends InsensitiveNotEquals {
+
+    public InsensitiveWildcardNotEquals(Source source,
+                                        Expression left,
+                                        Expression right, ZoneId zoneId) {
+        super(source, left, right, zoneId);
+    }
+
+    @Override
+    protected NodeInfo<InsensitiveNotEquals> info() {
+        return NodeInfo.create(this, InsensitiveWildcardNotEquals::new, left(), right(), zoneId());
+    }
+
+    @Override
+    protected InsensitiveWildcardNotEquals replaceChildren(Expression newLeft, Expression newRight) {
+        return new InsensitiveWildcardNotEquals(source(), newLeft, newRight, zoneId());
+    }
+
+    @Override
+    public InsensitiveWildcardNotEquals swapLeftAndRight() {
+        return new InsensitiveWildcardNotEquals(source(), right(), left(), zoneId());
+    }
+
+    @Override
+    public InsensitiveBinaryComparison negate() {
+        return new InsensitiveWildcardEquals(source(), left(), right(), zoneId());
+    }
+
+    @Override
+    protected String regularOperatorSymbol() {
+        return BinaryComparisonProcessor.BinaryComparisonOperation.NEQ.symbol();
+    }
+}
diff --git a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/optimizer/Optimizer.java b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/optimizer/Optimizer.java
index b3fac87bec993..da14cc2404cce 100644
--- a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/optimizer/Optimizer.java
+++ b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/optimizer/Optimizer.java
@@ -8,7 +8,8 @@
 
 import org.elasticsearch.xpack.eql.EqlIllegalArgumentException;
 import org.elasticsearch.xpack.eql.expression.predicate.operator.comparison.InsensitiveBinaryComparison;
-import org.elasticsearch.xpack.eql.expression.predicate.operator.comparison.InsensitiveNotEquals;
+import org.elasticsearch.xpack.eql.expression.predicate.operator.comparison.InsensitiveWildcardEquals;
+import org.elasticsearch.xpack.eql.expression.predicate.operator.comparison.InsensitiveWildcardNotEquals;
 import org.elasticsearch.xpack.eql.plan.logical.Join;
 import org.elasticsearch.xpack.eql.plan.logical.KeyedFilter;
 import org.elasticsearch.xpack.eql.plan.logical.LimitWithOffset;
@@ -114,26 +115,27 @@ private static class ReplaceWildcards extends OptimizerRule<Filter> {
         @Override
         protected LogicalPlan rule(Filter filter) {
             return filter.transformExpressionsUp(InsensitiveBinaryComparison.class, cmp -> {
-                // expr : "wildcard*phrase?" || expr !: "wildcard*phrase?"
                 Expression result = cmp;
-                Expression target = null;
-                String wildString = null;
+                if (cmp instanceof InsensitiveWildcardEquals || cmp instanceof InsensitiveWildcardNotEquals) {
+                    // expr : "wildcard*phrase?" || expr !: "wildcard*phrase?"
+                    Expression target = null;
+                    String wildString = null;
+
+                    // check only the right side
+                    if (isWildcard(cmp.right())) {
+                        wildString = (String) cmp.right().fold();
+                        target = cmp.left();
+                    }
 
-                // check only the right side
-                if (isWildcard(cmp.right())) {
-                    wildString = (String) cmp.right().fold();
-                    target = cmp.left();
-                }
+                    if (target != null) {
+                        Expression like = new Like(cmp.source(), target, StringUtils.toLikePattern(wildString), true);
+                        if (cmp instanceof InsensitiveWildcardNotEquals) {
+                            like = new Not(cmp.source(), like);
+                        }
 
-                if (target != null) {
-                    Expression like = new Like(cmp.source(), target, StringUtils.toLikePattern(wildString), true);
-                    if (cmp instanceof InsensitiveNotEquals) {
-                        like = new Not(cmp.source(), like);
+                        result = like;
                     }
-
-                    result = like;
                 }
-
                 return result;
             });
         }
diff --git a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/EqlBaseLexer.java b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/EqlBaseLexer.java
index cb688d432e559..af2d85518db21 100644
--- a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/EqlBaseLexer.java
+++ b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/EqlBaseLexer.java
@@ -17,39 +17,41 @@ class EqlBaseLexer extends Lexer {
   protected static final PredictionContextCache _sharedContextCache =
     new PredictionContextCache();
   public static final int
-    AND=1, ANY=2, BY=3, FALSE=4, IN=5, JOIN=6, MAXSPAN=7, NOT=8, NULL=9, OF=10, 
-    OR=11, SEQUENCE=12, TRUE=13, UNTIL=14, WHERE=15, WITH=16, SEQ=17, ASGN=18, 
-    EQ=19, NEQ=20, LT=21, LTE=22, GT=23, GTE=24, PLUS=25, MINUS=26, ASTERISK=27, 
-    SLASH=28, PERCENT=29, DOT=30, COMMA=31, LB=32, RB=33, LP=34, RP=35, PIPE=36, 
-    STRING=37, INTEGER_VALUE=38, DECIMAL_VALUE=39, IDENTIFIER=40, QUOTED_IDENTIFIER=41, 
-    TILDE_IDENTIFIER=42, LINE_COMMENT=43, BRACKETED_COMMENT=44, WS=45;
+    AND=1, ANY=2, BY=3, FALSE=4, IN=5, IN_INSENSITIVE=6, JOIN=7, MAXSPAN=8, 
+    NOT=9, NULL=10, OF=11, OR=12, SEQUENCE=13, TRUE=14, UNTIL=15, WHERE=16, 
+    WITH=17, SEQ=18, ASGN=19, EQ=20, NEQ=21, LT=22, LTE=23, GT=24, GTE=25, 
+    PLUS=26, MINUS=27, ASTERISK=28, SLASH=29, PERCENT=30, DOT=31, COMMA=32, 
+    LB=33, RB=34, LP=35, RP=36, PIPE=37, STRING=38, INTEGER_VALUE=39, DECIMAL_VALUE=40, 
+    IDENTIFIER=41, QUOTED_IDENTIFIER=42, TILDE_IDENTIFIER=43, LINE_COMMENT=44, 
+    BRACKETED_COMMENT=45, WS=46;
   public static String[] modeNames = {
     "DEFAULT_MODE"
   };
 
   public static final String[] ruleNames = {
-    "AND", "ANY", "BY", "FALSE", "IN", "JOIN", "MAXSPAN", "NOT", "NULL", "OF", 
-    "OR", "SEQUENCE", "TRUE", "UNTIL", "WHERE", "WITH", "SEQ", "ASGN", "EQ", 
-    "NEQ", "LT", "LTE", "GT", "GTE", "PLUS", "MINUS", "ASTERISK", "SLASH", 
-    "PERCENT", "DOT", "COMMA", "LB", "RB", "LP", "RP", "PIPE", "STRING", "INTEGER_VALUE", 
-    "DECIMAL_VALUE", "IDENTIFIER", "QUOTED_IDENTIFIER", "TILDE_IDENTIFIER", 
-    "EXPONENT", "DIGIT", "LETTER", "LINE_COMMENT", "BRACKETED_COMMENT", "WS"
+    "AND", "ANY", "BY", "FALSE", "IN", "IN_INSENSITIVE", "JOIN", "MAXSPAN", 
+    "NOT", "NULL", "OF", "OR", "SEQUENCE", "TRUE", "UNTIL", "WHERE", "WITH", 
+    "SEQ", "ASGN", "EQ", "NEQ", "LT", "LTE", "GT", "GTE", "PLUS", "MINUS", 
+    "ASTERISK", "SLASH", "PERCENT", "DOT", "COMMA", "LB", "RB", "LP", "RP", 
+    "PIPE", "STRING", "INTEGER_VALUE", "DECIMAL_VALUE", "IDENTIFIER", "QUOTED_IDENTIFIER", 
+    "TILDE_IDENTIFIER", "EXPONENT", "DIGIT", "LETTER", "LINE_COMMENT", "BRACKETED_COMMENT", 
+    "WS"
   };
 
   private static final String[] _LITERAL_NAMES = {
-    null, "'and'", "'any'", "'by'", "'false'", "'in'", "'join'", "'maxspan'", 
-    "'not'", "'null'", "'of'", "'or'", "'sequence'", "'true'", "'until'", 
-    "'where'", "'with'", "':'", "'='", "'=='", "'!='", "'<'", "'<='", "'>'", 
-    "'>='", "'+'", "'-'", "'*'", "'/'", "'%'", "'.'", "','", "'['", "']'", 
-    "'('", "')'", "'|'"
+    null, "'and'", "'any'", "'by'", "'false'", "'in'", "'in~'", "'join'", 
+    "'maxspan'", "'not'", "'null'", "'of'", "'or'", "'sequence'", "'true'", 
+    "'until'", "'where'", "'with'", "':'", "'='", "'=='", "'!='", "'<'", "'<='", 
+    "'>'", "'>='", "'+'", "'-'", "'*'", "'/'", "'%'", "'.'", "','", "'['", 
+    "']'", "'('", "')'", "'|'"
   };
   private static final String[] _SYMBOLIC_NAMES = {
-    null, "AND", "ANY", "BY", "FALSE", "IN", "JOIN", "MAXSPAN", "NOT", "NULL", 
-    "OF", "OR", "SEQUENCE", "TRUE", "UNTIL", "WHERE", "WITH", "SEQ", "ASGN", 
-    "EQ", "NEQ", "LT", "LTE", "GT", "GTE", "PLUS", "MINUS", "ASTERISK", "SLASH", 
-    "PERCENT", "DOT", "COMMA", "LB", "RB", "LP", "RP", "PIPE", "STRING", "INTEGER_VALUE", 
-    "DECIMAL_VALUE", "IDENTIFIER", "QUOTED_IDENTIFIER", "TILDE_IDENTIFIER", 
-    "LINE_COMMENT", "BRACKETED_COMMENT", "WS"
+    null, "AND", "ANY", "BY", "FALSE", "IN", "IN_INSENSITIVE", "JOIN", "MAXSPAN", 
+    "NOT", "NULL", "OF", "OR", "SEQUENCE", "TRUE", "UNTIL", "WHERE", "WITH", 
+    "SEQ", "ASGN", "EQ", "NEQ", "LT", "LTE", "GT", "GTE", "PLUS", "MINUS", 
+    "ASTERISK", "SLASH", "PERCENT", "DOT", "COMMA", "LB", "RB", "LP", "RP", 
+    "PIPE", "STRING", "INTEGER_VALUE", "DECIMAL_VALUE", "IDENTIFIER", "QUOTED_IDENTIFIER", 
+    "TILDE_IDENTIFIER", "LINE_COMMENT", "BRACKETED_COMMENT", "WS"
   };
   public static final Vocabulary VOCABULARY = new VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
 
@@ -106,156 +108,160 @@ public EqlBaseLexer(CharStream input) {
   public ATN getATN() { return _ATN; }
 
   public static final String _serializedATN =
-    "\3\u0430\ud6d1\u8206\uad2d\u4417\uaef1\u8d80\uaadd\2/\u01a7\b\1\4\2\t"+
-    "\2\4\3\t\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7\4\b\t\b\4\t\t\t\4\n\t\n\4\13"+
-    "\t\13\4\f\t\f\4\r\t\r\4\16\t\16\4\17\t\17\4\20\t\20\4\21\t\21\4\22\t\22"+
-    "\4\23\t\23\4\24\t\24\4\25\t\25\4\26\t\26\4\27\t\27\4\30\t\30\4\31\t\31"+
-    "\4\32\t\32\4\33\t\33\4\34\t\34\4\35\t\35\4\36\t\36\4\37\t\37\4 \t \4!"+
-    "\t!\4\"\t\"\4#\t#\4$\t$\4%\t%\4&\t&\4\'\t\'\4(\t(\4)\t)\4*\t*\4+\t+\4"+
-    ",\t,\4-\t-\4.\t.\4/\t/\4\60\t\60\4\61\t\61\3\2\3\2\3\2\3\2\3\3\3\3\3\3"+
-    "\3\3\3\4\3\4\3\4\3\5\3\5\3\5\3\5\3\5\3\5\3\6\3\6\3\6\3\7\3\7\3\7\3\7\3"+
-    "\7\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\b\3\t\3\t\3\t\3\t\3\n\3\n\3\n\3\n\3\n"+
-    "\3\13\3\13\3\13\3\f\3\f\3\f\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\r\3\16\3"+
-    "\16\3\16\3\16\3\16\3\17\3\17\3\17\3\17\3\17\3\17\3\20\3\20\3\20\3\20\3"+
-    "\20\3\20\3\21\3\21\3\21\3\21\3\21\3\22\3\22\3\23\3\23\3\24\3\24\3\24\3"+
-    "\25\3\25\3\25\3\26\3\26\3\27\3\27\3\27\3\30\3\30\3\31\3\31\3\31\3\32\3"+
-    "\32\3\33\3\33\3\34\3\34\3\35\3\35\3\36\3\36\3\37\3\37\3 \3 \3!\3!\3\""+
-    "\3\"\3#\3#\3$\3$\3%\3%\3&\3&\3&\3&\7&\u00e3\n&\f&\16&\u00e6\13&\3&\3&"+
-    "\3&\3&\3&\7&\u00ed\n&\f&\16&\u00f0\13&\3&\3&\3&\3&\3&\3&\3&\7&\u00f9\n"+
-    "&\f&\16&\u00fc\13&\3&\3&\3&\3&\3&\3&\3&\7&\u0105\n&\f&\16&\u0108\13&\3"+
-    "&\3&\3&\3&\3&\3&\7&\u0110\n&\f&\16&\u0113\13&\3&\3&\3&\3&\3&\5&\u011a"+
-    "\n&\3&\5&\u011d\n&\5&\u011f\n&\3\'\6\'\u0122\n\'\r\'\16\'\u0123\3(\6("+
-    "\u0127\n(\r(\16(\u0128\3(\3(\7(\u012d\n(\f(\16(\u0130\13(\3(\3(\6(\u0134"+
-    "\n(\r(\16(\u0135\3(\6(\u0139\n(\r(\16(\u013a\3(\3(\7(\u013f\n(\f(\16("+
-    "\u0142\13(\5(\u0144\n(\3(\3(\3(\3(\6(\u014a\n(\r(\16(\u014b\3(\3(\5(\u0150"+
-    "\n(\3)\3)\5)\u0154\n)\3)\3)\3)\7)\u0159\n)\f)\16)\u015c\13)\3*\3*\3*\3"+
-    "*\7*\u0162\n*\f*\16*\u0165\13*\3*\3*\3+\3+\3+\3+\7+\u016d\n+\f+\16+\u0170"+
-    "\13+\3+\3+\3,\3,\5,\u0176\n,\3,\6,\u0179\n,\r,\16,\u017a\3-\3-\3.\3.\3"+
-    "/\3/\3/\3/\7/\u0185\n/\f/\16/\u0188\13/\3/\5/\u018b\n/\3/\5/\u018e\n/"+
-    "\3/\3/\3\60\3\60\3\60\3\60\3\60\7\60\u0197\n\60\f\60\16\60\u019a\13\60"+
-    "\3\60\3\60\3\60\3\60\3\60\3\61\6\61\u01a2\n\61\r\61\16\61\u01a3\3\61\3"+
-    "\61\4\u0111\u0198\2\62\3\3\5\4\7\5\t\6\13\7\r\b\17\t\21\n\23\13\25\f\27"+
-    "\r\31\16\33\17\35\20\37\21!\22#\23%\24\'\25)\26+\27-\30/\31\61\32\63\33"+
-    "\65\34\67\359\36;\37= ?!A\"C#E$G%I&K\'M(O)Q*S+U,W\2Y\2[\2]-_.a/\3\2\17"+
+    "\3\u0430\ud6d1\u8206\uad2d\u4417\uaef1\u8d80\uaadd\2\60\u01ad\b\1\4\2"+
+    "\t\2\4\3\t\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7\4\b\t\b\4\t\t\t\4\n\t\n\4"+
+    "\13\t\13\4\f\t\f\4\r\t\r\4\16\t\16\4\17\t\17\4\20\t\20\4\21\t\21\4\22"+
+    "\t\22\4\23\t\23\4\24\t\24\4\25\t\25\4\26\t\26\4\27\t\27\4\30\t\30\4\31"+
+    "\t\31\4\32\t\32\4\33\t\33\4\34\t\34\4\35\t\35\4\36\t\36\4\37\t\37\4 \t"+
+    " \4!\t!\4\"\t\"\4#\t#\4$\t$\4%\t%\4&\t&\4\'\t\'\4(\t(\4)\t)\4*\t*\4+\t"+
+    "+\4,\t,\4-\t-\4.\t.\4/\t/\4\60\t\60\4\61\t\61\4\62\t\62\3\2\3\2\3\2\3"+
+    "\2\3\3\3\3\3\3\3\3\3\4\3\4\3\4\3\5\3\5\3\5\3\5\3\5\3\5\3\6\3\6\3\6\3\7"+
+    "\3\7\3\7\3\7\3\b\3\b\3\b\3\b\3\b\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\t\3\n\3"+
+    "\n\3\n\3\n\3\13\3\13\3\13\3\13\3\13\3\f\3\f\3\f\3\r\3\r\3\r\3\16\3\16"+
+    "\3\16\3\16\3\16\3\16\3\16\3\16\3\16\3\17\3\17\3\17\3\17\3\17\3\20\3\20"+
+    "\3\20\3\20\3\20\3\20\3\21\3\21\3\21\3\21\3\21\3\21\3\22\3\22\3\22\3\22"+
+    "\3\22\3\23\3\23\3\24\3\24\3\25\3\25\3\25\3\26\3\26\3\26\3\27\3\27\3\30"+
+    "\3\30\3\30\3\31\3\31\3\32\3\32\3\32\3\33\3\33\3\34\3\34\3\35\3\35\3\36"+
+    "\3\36\3\37\3\37\3 \3 \3!\3!\3\"\3\"\3#\3#\3$\3$\3%\3%\3&\3&\3\'\3\'\3"+
+    "\'\3\'\7\'\u00e9\n\'\f\'\16\'\u00ec\13\'\3\'\3\'\3\'\3\'\3\'\7\'\u00f3"+
+    "\n\'\f\'\16\'\u00f6\13\'\3\'\3\'\3\'\3\'\3\'\3\'\3\'\7\'\u00ff\n\'\f\'"+
+    "\16\'\u0102\13\'\3\'\3\'\3\'\3\'\3\'\3\'\3\'\7\'\u010b\n\'\f\'\16\'\u010e"+
+    "\13\'\3\'\3\'\3\'\3\'\3\'\3\'\7\'\u0116\n\'\f\'\16\'\u0119\13\'\3\'\3"+
+    "\'\3\'\3\'\3\'\5\'\u0120\n\'\3\'\5\'\u0123\n\'\5\'\u0125\n\'\3(\6(\u0128"+
+    "\n(\r(\16(\u0129\3)\6)\u012d\n)\r)\16)\u012e\3)\3)\7)\u0133\n)\f)\16)"+
+    "\u0136\13)\3)\3)\6)\u013a\n)\r)\16)\u013b\3)\6)\u013f\n)\r)\16)\u0140"+
+    "\3)\3)\7)\u0145\n)\f)\16)\u0148\13)\5)\u014a\n)\3)\3)\3)\3)\6)\u0150\n"+
+    ")\r)\16)\u0151\3)\3)\5)\u0156\n)\3*\3*\5*\u015a\n*\3*\3*\3*\7*\u015f\n"+
+    "*\f*\16*\u0162\13*\3+\3+\3+\3+\7+\u0168\n+\f+\16+\u016b\13+\3+\3+\3,\3"+
+    ",\3,\3,\7,\u0173\n,\f,\16,\u0176\13,\3,\3,\3-\3-\5-\u017c\n-\3-\6-\u017f"+
+    "\n-\r-\16-\u0180\3.\3.\3/\3/\3\60\3\60\3\60\3\60\7\60\u018b\n\60\f\60"+
+    "\16\60\u018e\13\60\3\60\5\60\u0191\n\60\3\60\5\60\u0194\n\60\3\60\3\60"+
+    "\3\61\3\61\3\61\3\61\3\61\7\61\u019d\n\61\f\61\16\61\u01a0\13\61\3\61"+
+    "\3\61\3\61\3\61\3\61\3\62\6\62\u01a8\n\62\r\62\16\62\u01a9\3\62\3\62\4"+
+    "\u0117\u019e\2\63\3\3\5\4\7\5\t\6\13\7\r\b\17\t\21\n\23\13\25\f\27\r\31"+
+    "\16\33\17\35\20\37\21!\22#\23%\24\'\25)\26+\27-\30/\31\61\32\63\33\65"+
+    "\34\67\359\36;\37= ?!A\"C#E$G%I&K\'M(O)Q*S+U,W-Y\2[\2]\2_.a/c\60\3\2\17"+
     "\n\2$$))^^ddhhppttvv\6\2\f\f\17\17))^^\6\2\f\f\17\17$$^^\5\2\f\f\17\17"+
     "$$\5\2\f\f\17\17))\4\2\f\f\17\17\4\2BBaa\3\2bb\4\2GGgg\4\2--//\3\2\62"+
-    ";\4\2C\\c|\5\2\13\f\17\17\"\"\u01ce\2\3\3\2\2\2\2\5\3\2\2\2\2\7\3\2\2"+
+    ";\4\2C\\c|\5\2\13\f\17\17\"\"\u01d4\2\3\3\2\2\2\2\5\3\2\2\2\2\7\3\2\2"+
     "\2\2\t\3\2\2\2\2\13\3\2\2\2\2\r\3\2\2\2\2\17\3\2\2\2\2\21\3\2\2\2\2\23"+
     "\3\2\2\2\2\25\3\2\2\2\2\27\3\2\2\2\2\31\3\2\2\2\2\33\3\2\2\2\2\35\3\2"+
     "\2\2\2\37\3\2\2\2\2!\3\2\2\2\2#\3\2\2\2\2%\3\2\2\2\2\'\3\2\2\2\2)\3\2"+
     "\2\2\2+\3\2\2\2\2-\3\2\2\2\2/\3\2\2\2\2\61\3\2\2\2\2\63\3\2\2\2\2\65\3"+
     "\2\2\2\2\67\3\2\2\2\29\3\2\2\2\2;\3\2\2\2\2=\3\2\2\2\2?\3\2\2\2\2A\3\2"+
     "\2\2\2C\3\2\2\2\2E\3\2\2\2\2G\3\2\2\2\2I\3\2\2\2\2K\3\2\2\2\2M\3\2\2\2"+
-    "\2O\3\2\2\2\2Q\3\2\2\2\2S\3\2\2\2\2U\3\2\2\2\2]\3\2\2\2\2_\3\2\2\2\2a"+
-    "\3\2\2\2\3c\3\2\2\2\5g\3\2\2\2\7k\3\2\2\2\tn\3\2\2\2\13t\3\2\2\2\rw\3"+
-    "\2\2\2\17|\3\2\2\2\21\u0084\3\2\2\2\23\u0088\3\2\2\2\25\u008d\3\2\2\2"+
-    "\27\u0090\3\2\2\2\31\u0093\3\2\2\2\33\u009c\3\2\2\2\35\u00a1\3\2\2\2\37"+
-    "\u00a7\3\2\2\2!\u00ad\3\2\2\2#\u00b2\3\2\2\2%\u00b4\3\2\2\2\'\u00b6\3"+
-    "\2\2\2)\u00b9\3\2\2\2+\u00bc\3\2\2\2-\u00be\3\2\2\2/\u00c1\3\2\2\2\61"+
-    "\u00c3\3\2\2\2\63\u00c6\3\2\2\2\65\u00c8\3\2\2\2\67\u00ca\3\2\2\29\u00cc"+
-    "\3\2\2\2;\u00ce\3\2\2\2=\u00d0\3\2\2\2?\u00d2\3\2\2\2A\u00d4\3\2\2\2C"+
-    "\u00d6\3\2\2\2E\u00d8\3\2\2\2G\u00da\3\2\2\2I\u00dc\3\2\2\2K\u011e\3\2"+
-    "\2\2M\u0121\3\2\2\2O\u014f\3\2\2\2Q\u0153\3\2\2\2S\u015d\3\2\2\2U\u0168"+
-    "\3\2\2\2W\u0173\3\2\2\2Y\u017c\3\2\2\2[\u017e\3\2\2\2]\u0180\3\2\2\2_"+
-    "\u0191\3\2\2\2a\u01a1\3\2\2\2cd\7c\2\2de\7p\2\2ef\7f\2\2f\4\3\2\2\2gh"+
-    "\7c\2\2hi\7p\2\2ij\7{\2\2j\6\3\2\2\2kl\7d\2\2lm\7{\2\2m\b\3\2\2\2no\7"+
-    "h\2\2op\7c\2\2pq\7n\2\2qr\7u\2\2rs\7g\2\2s\n\3\2\2\2tu\7k\2\2uv\7p\2\2"+
-    "v\f\3\2\2\2wx\7l\2\2xy\7q\2\2yz\7k\2\2z{\7p\2\2{\16\3\2\2\2|}\7o\2\2}"+
-    "~\7c\2\2~\177\7z\2\2\177\u0080\7u\2\2\u0080\u0081\7r\2\2\u0081\u0082\7"+
-    "c\2\2\u0082\u0083\7p\2\2\u0083\20\3\2\2\2\u0084\u0085\7p\2\2\u0085\u0086"+
-    "\7q\2\2\u0086\u0087\7v\2\2\u0087\22\3\2\2\2\u0088\u0089\7p\2\2\u0089\u008a"+
-    "\7w\2\2\u008a\u008b\7n\2\2\u008b\u008c\7n\2\2\u008c\24\3\2\2\2\u008d\u008e"+
-    "\7q\2\2\u008e\u008f\7h\2\2\u008f\26\3\2\2\2\u0090\u0091\7q\2\2\u0091\u0092"+
-    "\7t\2\2\u0092\30\3\2\2\2\u0093\u0094\7u\2\2\u0094\u0095\7g\2\2\u0095\u0096"+
-    "\7s\2\2\u0096\u0097\7w\2\2\u0097\u0098\7g\2\2\u0098\u0099\7p\2\2\u0099"+
-    "\u009a\7e\2\2\u009a\u009b\7g\2\2\u009b\32\3\2\2\2\u009c\u009d\7v\2\2\u009d"+
-    "\u009e\7t\2\2\u009e\u009f\7w\2\2\u009f\u00a0\7g\2\2\u00a0\34\3\2\2\2\u00a1"+
-    "\u00a2\7w\2\2\u00a2\u00a3\7p\2\2\u00a3\u00a4\7v\2\2\u00a4\u00a5\7k\2\2"+
-    "\u00a5\u00a6\7n\2\2\u00a6\36\3\2\2\2\u00a7\u00a8\7y\2\2\u00a8\u00a9\7"+
-    "j\2\2\u00a9\u00aa\7g\2\2\u00aa\u00ab\7t\2\2\u00ab\u00ac\7g\2\2\u00ac "+
-    "\3\2\2\2\u00ad\u00ae\7y\2\2\u00ae\u00af\7k\2\2\u00af\u00b0\7v\2\2\u00b0"+
-    "\u00b1\7j\2\2\u00b1\"\3\2\2\2\u00b2\u00b3\7<\2\2\u00b3$\3\2\2\2\u00b4"+
-    "\u00b5\7?\2\2\u00b5&\3\2\2\2\u00b6\u00b7\7?\2\2\u00b7\u00b8\7?\2\2\u00b8"+
-    "(\3\2\2\2\u00b9\u00ba\7#\2\2\u00ba\u00bb\7?\2\2\u00bb*\3\2\2\2\u00bc\u00bd"+
-    "\7>\2\2\u00bd,\3\2\2\2\u00be\u00bf\7>\2\2\u00bf\u00c0\7?\2\2\u00c0.\3"+
-    "\2\2\2\u00c1\u00c2\7@\2\2\u00c2\60\3\2\2\2\u00c3\u00c4\7@\2\2\u00c4\u00c5"+
-    "\7?\2\2\u00c5\62\3\2\2\2\u00c6\u00c7\7-\2\2\u00c7\64\3\2\2\2\u00c8\u00c9"+
-    "\7/\2\2\u00c9\66\3\2\2\2\u00ca\u00cb\7,\2\2\u00cb8\3\2\2\2\u00cc\u00cd"+
-    "\7\61\2\2\u00cd:\3\2\2\2\u00ce\u00cf\7\'\2\2\u00cf<\3\2\2\2\u00d0\u00d1"+
-    "\7\60\2\2\u00d1>\3\2\2\2\u00d2\u00d3\7.\2\2\u00d3@\3\2\2\2\u00d4\u00d5"+
-    "\7]\2\2\u00d5B\3\2\2\2\u00d6\u00d7\7_\2\2\u00d7D\3\2\2\2\u00d8\u00d9\7"+
-    "*\2\2\u00d9F\3\2\2\2\u00da\u00db\7+\2\2\u00dbH\3\2\2\2\u00dc\u00dd\7~"+
-    "\2\2\u00ddJ\3\2\2\2\u00de\u00e4\7)\2\2\u00df\u00e0\7^\2\2\u00e0\u00e3"+
-    "\t\2\2\2\u00e1\u00e3\n\3\2\2\u00e2\u00df\3\2\2\2\u00e2\u00e1\3\2\2\2\u00e3"+
-    "\u00e6\3\2\2\2\u00e4\u00e2\3\2\2\2\u00e4\u00e5\3\2\2\2\u00e5\u00e7\3\2"+
-    "\2\2\u00e6\u00e4\3\2\2\2\u00e7\u011f\7)\2\2\u00e8\u00ee\7$\2\2\u00e9\u00ea"+
-    "\7^\2\2\u00ea\u00ed\t\2\2\2\u00eb\u00ed\n\4\2\2\u00ec\u00e9\3\2\2\2\u00ec"+
-    "\u00eb\3\2\2\2\u00ed\u00f0\3\2\2\2\u00ee\u00ec\3\2\2\2\u00ee\u00ef\3\2"+
-    "\2\2\u00ef\u00f1\3\2\2\2\u00f0\u00ee\3\2\2\2\u00f1\u011f\7$\2\2\u00f2"+
-    "\u00f3\7A\2\2\u00f3\u00f4\7$\2\2\u00f4\u00fa\3\2\2\2\u00f5\u00f6\7^\2"+
-    "\2\u00f6\u00f9\7$\2\2\u00f7\u00f9\n\5\2\2\u00f8\u00f5\3\2\2\2\u00f8\u00f7"+
-    "\3\2\2\2\u00f9\u00fc\3\2\2\2\u00fa\u00f8\3\2\2\2\u00fa\u00fb\3\2\2\2\u00fb"+
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+    "\2\u012e\u012f\3\2\2\2\u012f\u0130\3\2\2\2\u0130\u0134\5? \2\u0131\u0133"+
+    "\5[.\2\u0132\u0131\3\2\2\2\u0133\u0136\3\2\2\2\u0134\u0132\3\2\2\2\u0134"+
+    "\u0135\3\2\2\2\u0135\u0156\3\2\2\2\u0136\u0134\3\2\2\2\u0137\u0139\5?"+
+    " \2\u0138\u013a\5[.\2\u0139\u0138\3\2\2\2\u013a\u013b\3\2\2\2\u013b\u0139"+
+    "\3\2\2\2\u013b\u013c\3\2\2\2\u013c\u0156\3\2\2\2\u013d\u013f\5[.\2\u013e"+
+    "\u013d\3\2\2\2\u013f\u0140\3\2\2\2\u0140\u013e\3\2\2\2\u0140\u0141\3\2"+
+    "\2\2\u0141\u0149\3\2\2\2\u0142\u0146\5? \2\u0143\u0145\5[.\2\u0144\u0143"+
+    "\3\2\2\2\u0145\u0148\3\2\2\2\u0146\u0144\3\2\2\2\u0146\u0147\3\2\2\2\u0147"+
+    "\u014a\3\2\2\2\u0148\u0146\3\2\2\2\u0149\u0142\3\2\2\2\u0149\u014a\3\2"+
+    "\2\2\u014a\u014b\3\2\2\2\u014b\u014c\5Y-\2\u014c\u0156\3\2\2\2\u014d\u014f"+
+    "\5? \2\u014e\u0150\5[.\2\u014f\u014e\3\2\2\2\u0150\u0151\3\2\2\2\u0151"+
+    "\u014f\3\2\2\2\u0151\u0152\3\2\2\2\u0152\u0153\3\2\2\2\u0153\u0154\5Y"+
+    "-\2\u0154\u0156\3\2\2\2\u0155\u012c\3\2\2\2\u0155\u0137\3\2\2\2\u0155"+
+    "\u013e\3\2\2\2\u0155\u014d\3\2\2\2\u0156R\3\2\2\2\u0157\u015a\5]/\2\u0158"+
+    "\u015a\t\b\2\2\u0159\u0157\3\2\2\2\u0159\u0158\3\2\2\2\u015a\u0160\3\2"+
+    "\2\2\u015b\u015f\5]/\2\u015c\u015f\5[.\2\u015d\u015f\7a\2\2\u015e\u015b"+
+    "\3\2\2\2\u015e\u015c\3\2\2\2\u015e\u015d\3\2\2\2\u015f\u0162\3\2\2\2\u0160"+
+    "\u015e\3\2\2\2\u0160\u0161\3\2\2\2\u0161T\3\2\2\2\u0162\u0160\3\2\2\2"+
+    "\u0163\u0169\7b\2\2\u0164\u0168\n\t\2\2\u0165\u0166\7b\2\2\u0166\u0168"+
+    "\7b\2\2\u0167\u0164\3\2\2\2\u0167\u0165\3\2\2\2\u0168\u016b\3\2\2\2\u0169"+
+    "\u0167\3\2\2\2\u0169\u016a\3\2\2\2\u016a\u016c\3\2\2\2\u016b\u0169\3\2"+
+    "\2\2\u016c\u016d\7b\2\2\u016dV\3\2\2\2\u016e\u0174\5]/\2\u016f\u0173\5"+
+    "]/\2\u0170\u0173\5[.\2\u0171\u0173\7a\2\2\u0172\u016f\3\2\2\2\u0172\u0170"+
+    "\3\2\2\2\u0172\u0171\3\2\2\2\u0173\u0176\3\2\2\2\u0174\u0172\3\2\2\2\u0174"+
+    "\u0175\3\2\2\2\u0175\u0177\3\2\2\2\u0176\u0174\3\2\2\2\u0177\u0178\7\u0080"+
+    "\2\2\u0178X\3\2\2\2\u0179\u017b\t\n\2\2\u017a\u017c\t\13\2\2\u017b\u017a"+
+    "\3\2\2\2\u017b\u017c\3\2\2\2\u017c\u017e\3\2\2\2\u017d\u017f\5[.\2\u017e"+
+    "\u017d\3\2\2\2\u017f\u0180\3\2\2\2\u0180\u017e\3\2\2\2\u0180\u0181\3\2"+
+    "\2\2\u0181Z\3\2\2\2\u0182\u0183\t\f\2\2\u0183\\\3\2\2\2\u0184\u0185\t"+
+    "\r\2\2\u0185^\3\2\2\2\u0186\u0187\7\61\2\2\u0187\u0188\7\61\2\2\u0188"+
+    "\u018c\3\2\2\2\u0189\u018b\n\7\2\2\u018a\u0189\3\2\2\2\u018b\u018e\3\2"+
+    "\2\2\u018c\u018a\3\2\2\2\u018c\u018d\3\2\2\2\u018d\u0190\3\2\2\2\u018e"+
+    "\u018c\3\2\2\2\u018f\u0191\7\17\2\2\u0190\u018f\3\2\2\2\u0190\u0191\3"+
+    "\2\2\2\u0191\u0193\3\2\2\2\u0192\u0194\7\f\2\2\u0193\u0192\3\2\2\2\u0193"+
+    "\u0194\3\2\2\2\u0194\u0195\3\2\2\2\u0195\u0196\b\60\2\2\u0196`\3\2\2\2"+
+    "\u0197\u0198\7\61\2\2\u0198\u0199\7,\2\2\u0199\u019e\3\2\2\2\u019a\u019d"+
+    "\5a\61\2\u019b\u019d\13\2\2\2\u019c\u019a\3\2\2\2\u019c\u019b\3\2\2\2"+
+    "\u019d\u01a0\3\2\2\2\u019e\u019f\3\2\2\2\u019e\u019c\3\2\2\2\u019f\u01a1"+
+    "\3\2\2\2\u01a0\u019e\3\2\2\2\u01a1\u01a2\7,\2\2\u01a2\u01a3\7\61\2\2\u01a3"+
+    "\u01a4\3\2\2\2\u01a4\u01a5\b\61\2\2\u01a5b\3\2\2\2\u01a6\u01a8\t\16\2"+
+    "\2\u01a7\u01a6\3\2\2\2\u01a8\u01a9\3\2\2\2\u01a9\u01a7\3\2\2\2\u01a9\u01aa"+
+    "\3\2\2\2\u01aa\u01ab\3\2\2\2\u01ab\u01ac\b\62\2\2\u01acd\3\2\2\2\'\2\u00e8"+
+    "\u00ea\u00f2\u00f4\u00fe\u0100\u010a\u010c\u0117\u011f\u0122\u0124\u0129"+
+    "\u012e\u0134\u013b\u0140\u0146\u0149\u0151\u0155\u0159\u015e\u0160\u0167"+
+    "\u0169\u0172\u0174\u017b\u0180\u018c\u0190\u0193\u019c\u019e\u01a9\3\2"+
+    "\3\2";
   public static final ATN _ATN =
     new ATNDeserializer().deserialize(_serializedATN.toCharArray());
   static {
diff --git a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/EqlBaseParser.java b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/EqlBaseParser.java
index b7fa53a5a0295..51565028843d2 100644
--- a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/EqlBaseParser.java
+++ b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/EqlBaseParser.java
@@ -17,12 +17,13 @@ class EqlBaseParser extends Parser {
   protected static final PredictionContextCache _sharedContextCache =
     new PredictionContextCache();
   public static final int
-    AND=1, ANY=2, BY=3, FALSE=4, IN=5, JOIN=6, MAXSPAN=7, NOT=8, NULL=9, OF=10, 
-    OR=11, SEQUENCE=12, TRUE=13, UNTIL=14, WHERE=15, WITH=16, SEQ=17, ASGN=18, 
-    EQ=19, NEQ=20, LT=21, LTE=22, GT=23, GTE=24, PLUS=25, MINUS=26, ASTERISK=27, 
-    SLASH=28, PERCENT=29, DOT=30, COMMA=31, LB=32, RB=33, LP=34, RP=35, PIPE=36, 
-    STRING=37, INTEGER_VALUE=38, DECIMAL_VALUE=39, IDENTIFIER=40, QUOTED_IDENTIFIER=41, 
-    TILDE_IDENTIFIER=42, LINE_COMMENT=43, BRACKETED_COMMENT=44, WS=45;
+    AND=1, ANY=2, BY=3, FALSE=4, IN=5, IN_INSENSITIVE=6, JOIN=7, MAXSPAN=8, 
+    NOT=9, NULL=10, OF=11, OR=12, SEQUENCE=13, TRUE=14, UNTIL=15, WHERE=16, 
+    WITH=17, SEQ=18, ASGN=19, EQ=20, NEQ=21, LT=22, LTE=23, GT=24, GTE=25, 
+    PLUS=26, MINUS=27, ASTERISK=28, SLASH=29, PERCENT=30, DOT=31, COMMA=32, 
+    LB=33, RB=34, LP=35, RP=36, PIPE=37, STRING=38, INTEGER_VALUE=39, DECIMAL_VALUE=40, 
+    IDENTIFIER=41, QUOTED_IDENTIFIER=42, TILDE_IDENTIFIER=43, LINE_COMMENT=44, 
+    BRACKETED_COMMENT=45, WS=46;
   public static final int
     RULE_singleStatement = 0, RULE_singleExpression = 1, RULE_statement = 2, 
     RULE_query = 3, RULE_sequenceParams = 4, RULE_sequence = 5, RULE_join = 6, 
@@ -43,19 +44,19 @@ class EqlBaseParser extends Parser {
   };
 
   private static final String[] _LITERAL_NAMES = {
-    null, "'and'", "'any'", "'by'", "'false'", "'in'", "'join'", "'maxspan'", 
-    "'not'", "'null'", "'of'", "'or'", "'sequence'", "'true'", "'until'", 
-    "'where'", "'with'", "':'", "'='", "'=='", "'!='", "'<'", "'<='", "'>'", 
-    "'>='", "'+'", "'-'", "'*'", "'/'", "'%'", "'.'", "','", "'['", "']'", 
-    "'('", "')'", "'|'"
+    null, "'and'", "'any'", "'by'", "'false'", "'in'", "'in~'", "'join'", 
+    "'maxspan'", "'not'", "'null'", "'of'", "'or'", "'sequence'", "'true'", 
+    "'until'", "'where'", "'with'", "':'", "'='", "'=='", "'!='", "'<'", "'<='", 
+    "'>'", "'>='", "'+'", "'-'", "'*'", "'/'", "'%'", "'.'", "','", "'['", 
+    "']'", "'('", "')'", "'|'"
   };
   private static final String[] _SYMBOLIC_NAMES = {
-    null, "AND", "ANY", "BY", "FALSE", "IN", "JOIN", "MAXSPAN", "NOT", "NULL", 
-    "OF", "OR", "SEQUENCE", "TRUE", "UNTIL", "WHERE", "WITH", "SEQ", "ASGN", 
-    "EQ", "NEQ", "LT", "LTE", "GT", "GTE", "PLUS", "MINUS", "ASTERISK", "SLASH", 
-    "PERCENT", "DOT", "COMMA", "LB", "RB", "LP", "RP", "PIPE", "STRING", "INTEGER_VALUE", 
-    "DECIMAL_VALUE", "IDENTIFIER", "QUOTED_IDENTIFIER", "TILDE_IDENTIFIER", 
-    "LINE_COMMENT", "BRACKETED_COMMENT", "WS"
+    null, "AND", "ANY", "BY", "FALSE", "IN", "IN_INSENSITIVE", "JOIN", "MAXSPAN", 
+    "NOT", "NULL", "OF", "OR", "SEQUENCE", "TRUE", "UNTIL", "WHERE", "WITH", 
+    "SEQ", "ASGN", "EQ", "NEQ", "LT", "LTE", "GT", "GTE", "PLUS", "MINUS", 
+    "ASTERISK", "SLASH", "PERCENT", "DOT", "COMMA", "LB", "RB", "LP", "RP", 
+    "PIPE", "STRING", "INTEGER_VALUE", "DECIMAL_VALUE", "IDENTIFIER", "QUOTED_IDENTIFIER", 
+    "TILDE_IDENTIFIER", "LINE_COMMENT", "BRACKETED_COMMENT", "WS"
   };
   public static final Vocabulary VOCABULARY = new VocabularyImpl(_LITERAL_NAMES, _SYMBOLIC_NAMES);
 
@@ -1628,6 +1629,7 @@ public ExpressionContext expression(int i) {
     }
     public TerminalNode RP() { return getToken(EqlBaseParser.RP, 0); }
     public TerminalNode IN() { return getToken(EqlBaseParser.IN, 0); }
+    public TerminalNode IN_INSENSITIVE() { return getToken(EqlBaseParser.IN_INSENSITIVE, 0); }
     public TerminalNode NOT() { return getToken(EqlBaseParser.NOT, 0); }
     public List<TerminalNode> COMMA() { return getTokens(EqlBaseParser.COMMA); }
     public TerminalNode COMMA(int i) {
@@ -1680,7 +1682,13 @@ public final PredicateContext predicate() throws RecognitionException {
         }
 
         setState(214);
-        ((PredicateContext)_localctx).kind = match(IN);
+        ((PredicateContext)_localctx).kind = _input.LT(1);
+        _la = _input.LA(1);
+        if ( !(_la==IN || _la==IN_INSENSITIVE) ) {
+          ((PredicateContext)_localctx).kind = (Token)_errHandler.recoverInline(this);
+        } else {
+          consume();
+        }
         setState(215);
         match(LP);
         setState(216);
@@ -2701,9 +2709,9 @@ private boolean operatorExpression_sempred(OperatorExpressionContext _localctx,
   }
 
   public static final String _serializedATN =
-    "\3\u0430\ud6d1\u8206\uad2d\u4417\uaef1\u8d80\uaadd\3/\u0135\4\2\t\2\4"+
-    "\3\t\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7\4\b\t\b\4\t\t\t\4\n\t\n\4\13\t"+
-    "\13\4\f\t\f\4\r\t\r\4\16\t\16\4\17\t\17\4\20\t\20\4\21\t\21\4\22\t\22"+
+    "\3\u0430\ud6d1\u8206\uad2d\u4417\uaef1\u8d80\uaadd\3\60\u0135\4\2\t\2"+
+    "\4\3\t\3\4\4\t\4\4\5\t\5\4\6\t\6\4\7\t\7\4\b\t\b\4\t\t\t\4\n\t\n\4\13"+
+    "\t\13\4\f\t\f\4\r\t\r\4\16\t\16\4\17\t\17\4\20\t\20\4\21\t\21\4\22\t\22"+
     "\4\23\t\23\4\24\t\24\4\25\t\25\4\26\t\26\4\27\t\27\4\30\t\30\4\31\t\31"+
     "\4\32\t\32\4\33\t\33\4\34\t\34\4\35\t\35\4\36\t\36\4\37\t\37\4 \t \3\2"+
     "\3\2\3\2\3\3\3\3\3\3\3\4\3\4\7\4I\n\4\f\4\16\4L\13\4\3\5\3\5\3\5\5\5Q"+
@@ -2726,43 +2734,43 @@ private boolean operatorExpression_sempred(OperatorExpressionContext _localctx,
     "\3\33\6\33\u011d\n\33\r\33\16\33\u011e\3\33\7\33\u0122\n\33\f\33\16\33"+
     "\u0125\13\33\3\34\3\34\3\35\3\35\5\35\u012b\n\35\3\36\3\36\5\36\u012f"+
     "\n\36\3\37\3\37\3 \3 \3 \2\4 $!\2\4\6\b\n\f\16\20\22\24\26\30\32\34\36"+
-    " \"$&(*,.\60\62\64\668:<>\2\t\3\2\33\34\3\2\35\37\4\2**,,\3\2\25\32\4"+
-    "\2\6\6\17\17\3\2*+\4\2\'\'**\u0142\2@\3\2\2\2\4C\3\2\2\2\6F\3\2\2\2\b"+
-    "P\3\2\2\2\nR\3\2\2\2\fW\3\2\2\2\16l\3\2\2\2\20z\3\2\2\2\22\u0086\3\2\2"+
-    "\2\24\u008f\3\2\2\2\26\u0093\3\2\2\2\30\u0097\3\2\2\2\32\u009b\3\2\2\2"+
-    "\34\u009f\3\2\2\2\36\u00a4\3\2\2\2 \u00ad\3\2\2\2\"\u00bf\3\2\2\2$\u00c8"+
+    " \"$&(*,.\60\62\64\668:<>\2\n\3\2\34\35\3\2\36 \3\2\7\b\4\2++--\3\2\26"+
+    "\33\4\2\6\6\20\20\3\2+,\4\2((++\u0142\2@\3\2\2\2\4C\3\2\2\2\6F\3\2\2\2"+
+    "\bP\3\2\2\2\nR\3\2\2\2\fW\3\2\2\2\16l\3\2\2\2\20z\3\2\2\2\22\u0086\3\2"+
+    "\2\2\24\u008f\3\2\2\2\26\u0093\3\2\2\2\30\u0097\3\2\2\2\32\u009b\3\2\2"+
+    "\2\34\u009f\3\2\2\2\36\u00a4\3\2\2\2 \u00ad\3\2\2\2\"\u00bf\3\2\2\2$\u00c8"+
     "\3\2\2\2&\u00f2\3\2\2\2(\u00fb\3\2\2\2*\u00fd\3\2\2\2,\u010b\3\2\2\2."+
     "\u0111\3\2\2\2\60\u0113\3\2\2\2\62\u0115\3\2\2\2\64\u0117\3\2\2\2\66\u0126"+
     "\3\2\2\28\u0128\3\2\2\2:\u012e\3\2\2\2<\u0130\3\2\2\2>\u0132\3\2\2\2@"+
     "A\5\6\4\2AB\7\2\2\3B\3\3\2\2\2CD\5\36\20\2DE\7\2\2\3E\5\3\2\2\2FJ\5\b"+
     "\5\2GI\5\20\t\2HG\3\2\2\2IL\3\2\2\2JH\3\2\2\2JK\3\2\2\2K\7\3\2\2\2LJ\3"+
     "\2\2\2MQ\5\f\7\2NQ\5\16\b\2OQ\5\32\16\2PM\3\2\2\2PN\3\2\2\2PO\3\2\2\2"+
-    "Q\t\3\2\2\2RS\7\22\2\2ST\7\t\2\2TU\7\24\2\2UV\58\35\2V\13\3\2\2\2W`\7"+
-    "\16\2\2XZ\5\22\n\2Y[\5\n\6\2ZY\3\2\2\2Z[\3\2\2\2[a\3\2\2\2\\^\5\n\6\2"+
+    "Q\t\3\2\2\2RS\7\23\2\2ST\7\n\2\2TU\7\25\2\2UV\58\35\2V\13\3\2\2\2W`\7"+
+    "\17\2\2XZ\5\22\n\2Y[\5\n\6\2ZY\3\2\2\2Z[\3\2\2\2[a\3\2\2\2\\^\5\n\6\2"+
     "]_\5\22\n\2^]\3\2\2\2^_\3\2\2\2_a\3\2\2\2`X\3\2\2\2`\\\3\2\2\2`a\3\2\2"+
     "\2ab\3\2\2\2bd\5\26\f\2ce\5\26\f\2dc\3\2\2\2ef\3\2\2\2fd\3\2\2\2fg\3\2"+
-    "\2\2gj\3\2\2\2hi\7\20\2\2ik\5\26\f\2jh\3\2\2\2jk\3\2\2\2k\r\3\2\2\2ln"+
-    "\7\b\2\2mo\5\22\n\2nm\3\2\2\2no\3\2\2\2op\3\2\2\2pr\5\24\13\2qs\5\24\13"+
-    "\2rq\3\2\2\2st\3\2\2\2tr\3\2\2\2tu\3\2\2\2ux\3\2\2\2vw\7\20\2\2wy\5\24"+
-    "\13\2xv\3\2\2\2xy\3\2\2\2y\17\3\2\2\2z{\7&\2\2{\u0084\7*\2\2|\u0081\5"+
-    " \21\2}~\7!\2\2~\u0080\5 \21\2\177}\3\2\2\2\u0080\u0083\3\2\2\2\u0081"+
+    "\2\2gj\3\2\2\2hi\7\21\2\2ik\5\26\f\2jh\3\2\2\2jk\3\2\2\2k\r\3\2\2\2ln"+
+    "\7\t\2\2mo\5\22\n\2nm\3\2\2\2no\3\2\2\2op\3\2\2\2pr\5\24\13\2qs\5\24\13"+
+    "\2rq\3\2\2\2st\3\2\2\2tr\3\2\2\2tu\3\2\2\2ux\3\2\2\2vw\7\21\2\2wy\5\24"+
+    "\13\2xv\3\2\2\2xy\3\2\2\2y\17\3\2\2\2z{\7\'\2\2{\u0084\7+\2\2|\u0081\5"+
+    " \21\2}~\7\"\2\2~\u0080\5 \21\2\177}\3\2\2\2\u0080\u0083\3\2\2\2\u0081"+
     "\177\3\2\2\2\u0081\u0082\3\2\2\2\u0082\u0085\3\2\2\2\u0083\u0081\3\2\2"+
     "\2\u0084|\3\2\2\2\u0084\u0085\3\2\2\2\u0085\21\3\2\2\2\u0086\u0087\7\5"+
-    "\2\2\u0087\u008c\5\36\20\2\u0088\u0089\7!\2\2\u0089\u008b\5\36\20\2\u008a"+
+    "\2\2\u0087\u008c\5\36\20\2\u0088\u0089\7\"\2\2\u0089\u008b\5\36\20\2\u008a"+
     "\u0088\3\2\2\2\u008b\u008e\3\2\2\2\u008c\u008a\3\2\2\2\u008c\u008d\3\2"+
     "\2\2\u008d\23\3\2\2\2\u008e\u008c\3\2\2\2\u008f\u0091\5\30\r\2\u0090\u0092"+
     "\5\22\n\2\u0091\u0090\3\2\2\2\u0091\u0092\3\2\2\2\u0092\25\3\2\2\2\u0093"+
     "\u0095\5\30\r\2\u0094\u0096\5\22\n\2\u0095\u0094\3\2\2\2\u0095\u0096\3"+
-    "\2\2\2\u0096\27\3\2\2\2\u0097\u0098\7\"\2\2\u0098\u0099\5\34\17\2\u0099"+
-    "\u009a\7#\2\2\u009a\31\3\2\2\2\u009b\u009c\5\34\17\2\u009c\33\3\2\2\2"+
+    "\2\2\2\u0096\27\3\2\2\2\u0097\u0098\7#\2\2\u0098\u0099\5\34\17\2\u0099"+
+    "\u009a\7$\2\2\u009a\31\3\2\2\2\u009b\u009c\5\34\17\2\u009c\33\3\2\2\2"+
     "\u009d\u00a0\7\4\2\2\u009e\u00a0\5> \2\u009f\u009d\3\2\2\2\u009f\u009e"+
-    "\3\2\2\2\u00a0\u00a1\3\2\2\2\u00a1\u00a2\7\21\2\2\u00a2\u00a3\5\36\20"+
+    "\3\2\2\2\u00a0\u00a1\3\2\2\2\u00a1\u00a2\7\22\2\2\u00a2\u00a3\5\36\20"+
     "\2\u00a3\35\3\2\2\2\u00a4\u00a5\5 \21\2\u00a5\37\3\2\2\2\u00a6\u00a7\b"+
-    "\21\1\2\u00a7\u00a8\7\n\2\2\u00a8\u00ae\5 \21\7\u00a9\u00aa\7*\2\2\u00aa"+
-    "\u00ab\7\f\2\2\u00ab\u00ae\5\30\r\2\u00ac\u00ae\5\"\22\2\u00ad\u00a6\3"+
+    "\21\1\2\u00a7\u00a8\7\13\2\2\u00a8\u00ae\5 \21\7\u00a9\u00aa\7+\2\2\u00aa"+
+    "\u00ab\7\r\2\2\u00ab\u00ae\5\30\r\2\u00ac\u00ae\5\"\22\2\u00ad\u00a6\3"+
     "\2\2\2\u00ad\u00a9\3\2\2\2\u00ad\u00ac\3\2\2\2\u00ae\u00b7\3\2\2\2\u00af"+
     "\u00b0\f\4\2\2\u00b0\u00b1\7\3\2\2\u00b1\u00b6\5 \21\5\u00b2\u00b3\f\3"+
-    "\2\2\u00b3\u00b4\7\r\2\2\u00b4\u00b6\5 \21\4\u00b5\u00af\3\2\2\2\u00b5"+
+    "\2\2\u00b3\u00b4\7\16\2\2\u00b4\u00b6\5 \21\4\u00b5\u00af\3\2\2\2\u00b5"+
     "\u00b2\3\2\2\2\u00b6\u00b9\3\2\2\2\u00b7\u00b5\3\2\2\2\u00b7\u00b8\3\2"+
     "\2\2\u00b8!\3\2\2\2\u00b9\u00b7\3\2\2\2\u00ba\u00c0\5$\23\2\u00bb\u00bc"+
     "\5$\23\2\u00bc\u00bd\5\60\31\2\u00bd\u00be\5$\23\2\u00be\u00c0\3\2\2\2"+
@@ -2773,39 +2781,39 @@ private boolean operatorExpression_sempred(OperatorExpressionContext _localctx,
     "\u00cb\f\4\2\2\u00cb\u00cc\t\3\2\2\u00cc\u00d1\5$\23\5\u00cd\u00ce\f\3"+
     "\2\2\u00ce\u00cf\t\2\2\2\u00cf\u00d1\5$\23\4\u00d0\u00ca\3\2\2\2\u00d0"+
     "\u00cd\3\2\2\2\u00d1\u00d4\3\2\2\2\u00d2\u00d0\3\2\2\2\u00d2\u00d3\3\2"+
-    "\2\2\u00d3%\3\2\2\2\u00d4\u00d2\3\2\2\2\u00d5\u00d7\7\n\2\2\u00d6\u00d5"+
-    "\3\2\2\2\u00d6\u00d7\3\2\2\2\u00d7\u00d8\3\2\2\2\u00d8\u00d9\7\7\2\2\u00d9"+
-    "\u00da\7$\2\2\u00da\u00df\5\36\20\2\u00db\u00dc\7!\2\2\u00dc\u00de\5\36"+
-    "\20\2\u00dd\u00db\3\2\2\2\u00de\u00e1\3\2\2\2\u00df\u00dd\3\2\2\2\u00df"+
-    "\u00e0\3\2\2\2\u00e0\u00e2\3\2\2\2\u00e1\u00df\3\2\2\2\u00e2\u00e3\7%"+
-    "\2\2\u00e3\u00f3\3\2\2\2\u00e4\u00e5\7\23\2\2\u00e5\u00f3\5.\30\2\u00e6"+
-    "\u00e7\7\23\2\2\u00e7\u00e8\7$\2\2\u00e8\u00ed\5.\30\2\u00e9\u00ea\7!"+
+    "\2\2\u00d3%\3\2\2\2\u00d4\u00d2\3\2\2\2\u00d5\u00d7\7\13\2\2\u00d6\u00d5"+
+    "\3\2\2\2\u00d6\u00d7\3\2\2\2\u00d7\u00d8\3\2\2\2\u00d8\u00d9\t\4\2\2\u00d9"+
+    "\u00da\7%\2\2\u00da\u00df\5\36\20\2\u00db\u00dc\7\"\2\2\u00dc\u00de\5"+
+    "\36\20\2\u00dd\u00db\3\2\2\2\u00de\u00e1\3\2\2\2\u00df\u00dd\3\2\2\2\u00df"+
+    "\u00e0\3\2\2\2\u00e0\u00e2\3\2\2\2\u00e1\u00df\3\2\2\2\u00e2\u00e3\7&"+
+    "\2\2\u00e3\u00f3\3\2\2\2\u00e4\u00e5\7\24\2\2\u00e5\u00f3\5.\30\2\u00e6"+
+    "\u00e7\7\24\2\2\u00e7\u00e8\7%\2\2\u00e8\u00ed\5.\30\2\u00e9\u00ea\7\""+
     "\2\2\u00ea\u00ec\5.\30\2\u00eb\u00e9\3\2\2\2\u00ec\u00ef\3\2\2\2\u00ed"+
     "\u00eb\3\2\2\2\u00ed\u00ee\3\2\2\2\u00ee\u00f0\3\2\2\2\u00ef\u00ed\3\2"+
-    "\2\2\u00f0\u00f1\7%\2\2\u00f1\u00f3\3\2\2\2\u00f2\u00d6\3\2\2\2\u00f2"+
+    "\2\2\u00f0\u00f1\7&\2\2\u00f1\u00f3\3\2\2\2\u00f2\u00d6\3\2\2\2\u00f2"+
     "\u00e4\3\2\2\2\u00f2\u00e6\3\2\2\2\u00f3\'\3\2\2\2\u00f4\u00fc\5.\30\2"+
-    "\u00f5\u00fc\5*\26\2\u00f6\u00fc\5\64\33\2\u00f7\u00f8\7$\2\2\u00f8\u00f9"+
-    "\5\36\20\2\u00f9\u00fa\7%\2\2\u00fa\u00fc\3\2\2\2\u00fb\u00f4\3\2\2\2"+
+    "\u00f5\u00fc\5*\26\2\u00f6\u00fc\5\64\33\2\u00f7\u00f8\7%\2\2\u00f8\u00f9"+
+    "\5\36\20\2\u00f9\u00fa\7&\2\2\u00fa\u00fc\3\2\2\2\u00fb\u00f4\3\2\2\2"+
     "\u00fb\u00f5\3\2\2\2\u00fb\u00f6\3\2\2\2\u00fb\u00f7\3\2\2\2\u00fc)\3"+
-    "\2\2\2\u00fd\u00fe\5,\27\2\u00fe\u0107\7$\2\2\u00ff\u0104\5\36\20\2\u0100"+
-    "\u0101\7!\2\2\u0101\u0103\5\36\20\2\u0102\u0100\3\2\2\2\u0103\u0106\3"+
+    "\2\2\2\u00fd\u00fe\5,\27\2\u00fe\u0107\7%\2\2\u00ff\u0104\5\36\20\2\u0100"+
+    "\u0101\7\"\2\2\u0101\u0103\5\36\20\2\u0102\u0100\3\2\2\2\u0103\u0106\3"+
     "\2\2\2\u0104\u0102\3\2\2\2\u0104\u0105\3\2\2\2\u0105\u0108\3\2\2\2\u0106"+
     "\u0104\3\2\2\2\u0107\u00ff\3\2\2\2\u0107\u0108\3\2\2\2\u0108\u0109\3\2"+
-    "\2\2\u0109\u010a\7%\2\2\u010a+\3\2\2\2\u010b\u010c\t\4\2\2\u010c-\3\2"+
-    "\2\2\u010d\u0112\7\13\2\2\u010e\u0112\5:\36\2\u010f\u0112\5\62\32\2\u0110"+
+    "\2\2\u0109\u010a\7&\2\2\u010a+\3\2\2\2\u010b\u010c\t\5\2\2\u010c-\3\2"+
+    "\2\2\u010d\u0112\7\f\2\2\u010e\u0112\5:\36\2\u010f\u0112\5\62\32\2\u0110"+
     "\u0112\5<\37\2\u0111\u010d\3\2\2\2\u0111\u010e\3\2\2\2\u0111\u010f\3\2"+
-    "\2\2\u0111\u0110\3\2\2\2\u0112/\3\2\2\2\u0113\u0114\t\5\2\2\u0114\61\3"+
-    "\2\2\2\u0115\u0116\t\6\2\2\u0116\63\3\2\2\2\u0117\u0123\5\66\34\2\u0118"+
-    "\u0119\7 \2\2\u0119\u0122\5\66\34\2\u011a\u011c\7\"\2\2\u011b\u011d\7"+
-    "(\2\2\u011c\u011b\3\2\2\2\u011d\u011e\3\2\2\2\u011e\u011c\3\2\2\2\u011e"+
-    "\u011f\3\2\2\2\u011f\u0120\3\2\2\2\u0120\u0122\7#\2\2\u0121\u0118\3\2"+
+    "\2\2\u0111\u0110\3\2\2\2\u0112/\3\2\2\2\u0113\u0114\t\6\2\2\u0114\61\3"+
+    "\2\2\2\u0115\u0116\t\7\2\2\u0116\63\3\2\2\2\u0117\u0123\5\66\34\2\u0118"+
+    "\u0119\7!\2\2\u0119\u0122\5\66\34\2\u011a\u011c\7#\2\2\u011b\u011d\7)"+
+    "\2\2\u011c\u011b\3\2\2\2\u011d\u011e\3\2\2\2\u011e\u011c\3\2\2\2\u011e"+
+    "\u011f\3\2\2\2\u011f\u0120\3\2\2\2\u0120\u0122\7$\2\2\u0121\u0118\3\2"+
     "\2\2\u0121\u011a\3\2\2\2\u0122\u0125\3\2\2\2\u0123\u0121\3\2\2\2\u0123"+
-    "\u0124\3\2\2\2\u0124\65\3\2\2\2\u0125\u0123\3\2\2\2\u0126\u0127\t\7\2"+
-    "\2\u0127\67\3\2\2\2\u0128\u012a\5:\36\2\u0129\u012b\7*\2\2\u012a\u0129"+
-    "\3\2\2\2\u012a\u012b\3\2\2\2\u012b9\3\2\2\2\u012c\u012f\7)\2\2\u012d\u012f"+
-    "\7(\2\2\u012e\u012c\3\2\2\2\u012e\u012d\3\2\2\2\u012f;\3\2\2\2\u0130\u0131"+
-    "\7\'\2\2\u0131=\3\2\2\2\u0132\u0133\t\b\2\2\u0133?\3\2\2\2\'JPZ^`fjnt"+
-    "x\u0081\u0084\u008c\u0091\u0095\u009f\u00ad\u00b5\u00b7\u00bf\u00c4\u00c8"+
+    "\u0124\3\2\2\2\u0124\65\3\2\2\2\u0125\u0123\3\2\2\2\u0126\u0127\t\b\2"+
+    "\2\u0127\67\3\2\2\2\u0128\u012a\5:\36\2\u0129\u012b\7+\2\2\u012a\u0129"+
+    "\3\2\2\2\u012a\u012b\3\2\2\2\u012b9\3\2\2\2\u012c\u012f\7*\2\2\u012d\u012f"+
+    "\7)\2\2\u012e\u012c\3\2\2\2\u012e\u012d\3\2\2\2\u012f;\3\2\2\2\u0130\u0131"+
+    "\7(\2\2\u0131=\3\2\2\2\u0132\u0133\t\t\2\2\u0133?\3\2\2\2\'JPZ^`fjntx"+
+    "\u0081\u0084\u008c\u0091\u0095\u009f\u00ad\u00b5\u00b7\u00bf\u00c4\u00c8"+
     "\u00d0\u00d2\u00d6\u00df\u00ed\u00f2\u00fb\u0104\u0107\u0111\u011e\u0121"+
     "\u0123\u012a\u012e";
   public static final ATN _ATN =
diff --git a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/ExpressionBuilder.java b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/ExpressionBuilder.java
index 4dd4595b6c2a4..082756af7b7c0 100644
--- a/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/ExpressionBuilder.java
+++ b/x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/parser/ExpressionBuilder.java
@@ -11,6 +11,7 @@
 import org.antlr.v4.runtime.tree.TerminalNode;
 import org.elasticsearch.xpack.eql.expression.function.EqlFunctionResolution;
 import org.elasticsearch.xpack.eql.expression.predicate.operator.comparison.InsensitiveEquals;
+import org.elasticsearch.xpack.eql.expression.predicate.operator.comparison.InsensitiveWildcardEquals;
 import org.elasticsearch.xpack.eql.parser.EqlBaseParser.ArithmeticUnaryContext;
 import org.elasticsearch.xpack.eql.parser.EqlBaseParser.ComparisonContext;
 import org.elasticsearch.xpack.eql.parser.EqlBaseParser.DereferenceContext;
@@ -167,8 +168,13 @@ public Expression visitOperatorExpressionDefault(EqlBaseParser.OperatorExpressio
         switch (predicate.kind.getType()) {
             case EqlBaseParser.SEQ:
                 return Predicates.combineOr(expressions(predicate.constant()).stream()
+                    .map(c -> new InsensitiveWildcardEquals(source, expr, c, zoneId))
+                    .collect(toList()));
+            case EqlBaseParser.IN_INSENSITIVE:
+                Expression insensitiveIn = Predicates.combineOr(expressions(predicate.expression()).stream()
                     .map(c -> new InsensitiveEquals(source, expr, c, zoneId))
                     .collect(toList()));
+                return predicate.NOT() != null ? new Not(source, insensitiveIn) : insensitiveIn;
             case EqlBaseParser.IN:
                 List<Expression> container = expressions(predicate.expression());
                 Expression checkInSet = new In(source, expr, container, zoneId);
diff --git a/x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/EqlTestUtils.java b/x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/EqlTestUtils.java
index d3326360915f4..7b92bb42882b2 100644
--- a/x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/EqlTestUtils.java
+++ b/x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/EqlTestUtils.java
@@ -14,6 +14,8 @@
 import org.elasticsearch.xpack.eql.action.EqlSearchTask;
 import org.elasticsearch.xpack.eql.expression.predicate.operator.comparison.InsensitiveEquals;
 import org.elasticsearch.xpack.eql.expression.predicate.operator.comparison.InsensitiveNotEquals;
+import org.elasticsearch.xpack.eql.expression.predicate.operator.comparison.InsensitiveWildcardEquals;
+import org.elasticsearch.xpack.eql.expression.predicate.operator.comparison.InsensitiveWildcardNotEquals;
 import org.elasticsearch.xpack.eql.session.EqlConfiguration;
 import org.elasticsearch.xpack.ql.expression.Expression;
 
@@ -33,7 +35,7 @@ private EqlTestUtils() {
     }
 
     public static final EqlConfiguration TEST_CFG = new EqlConfiguration(new String[] {"none"},
-            org.elasticsearch.xpack.ql.util.DateUtils.UTC, "nobody", "cluster", null, TimeValue.timeValueSeconds(30), null, 
+            org.elasticsearch.xpack.ql.util.DateUtils.UTC, "nobody", "cluster", null, TimeValue.timeValueSeconds(30), null,
             123, "", new TaskId("test", 123), null);
 
     public static EqlConfiguration randomConfiguration() {
@@ -56,11 +58,11 @@ public static EqlSearchTask randomTask() {
     }
 
     public static InsensitiveEquals seq(Expression left, Expression right) {
-        return new InsensitiveEquals(EMPTY, left, right, randomZone());
+        return new InsensitiveWildcardEquals(EMPTY, left, right, randomZone());
     }
 
     public static InsensitiveNotEquals sneq(Expression left, Expression right) {
-        return new InsensitiveNotEquals(EMPTY, left, right, randomZone());
+        return new InsensitiveWildcardNotEquals(EMPTY, left, right, randomZone());
     }
 
     public static IndicesOptions randomIndicesOptions() {
diff --git a/x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/parser/ExpressionTests.java b/x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/parser/ExpressionTests.java
index e6226f37bf8c3..3a90c6a0490fd 100644
--- a/x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/parser/ExpressionTests.java
+++ b/x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/parser/ExpressionTests.java
@@ -395,7 +395,7 @@ public void testChainedComparisonsDisallowed() {
         }
         ParsingException e = expectThrows(ParsingException.class, () -> expr(sb.toString()));
         assertEquals("line 1:" + (6 + firstComparator.length()) + ": mismatched input '" + secondComparator +
-                        "' expecting {<EOF>, 'and', 'in', 'not', 'or', ':', '+', '-', '*', '/', '%', '.', '['}",
-                e.getMessage());
+                "' expecting {<EOF>, 'and', 'in', 'in~', 'not', 'or', ':', '+', '-', '*', '/', '%', '.', '['}",
+            e.getMessage());
     }
 }
diff --git a/x-pack/plugin/eql/src/test/resources/queryfolder_tests.txt b/x-pack/plugin/eql/src/test/resources/queryfolder_tests.txt
index 068756122ec4e..acd611c3849f6 100644
--- a/x-pack/plugin/eql/src/test/resources/queryfolder_tests.txt
+++ b/x-pack/plugin/eql/src/test/resources/queryfolder_tests.txt
@@ -110,6 +110,29 @@ process where process_path : "*\\red_ttp\\wininit.*" and opcode in (0,1,2,3)
 {"terms":{"opcode":[0,1,2,3],"boost":1.0}}
 ;
 
+inFilterInsensitive
+process where process_name in~ ("test")
+;
+"term":{"process_name":{"value":"test","case_insensitive":true,"boost":1.0}
+;
+
+inFilterInsensitiveList
+process where process_name in~ ("test", "best")
+;
+{"bool":{"should":[{"term"
+"term":{"process_name":{"value":"test","case_insensitive":true,"boost":1.0}
+"term":{"process_name":{"value":"best","case_insensitive":true,"boost":1.0}
+;
+
+inFilterInsensitiveVerbatimMatch
+process where process_name in~ ("test*", "best")
+;
+{"bool":{"should":[{"term"
+"term":{"process_name":{"value":"test*","case_insensitive":true,"boost":1.0}
+"term":{"process_name":{"value":"best","case_insensitive":true,"boost":1.0}
+;
+
+
 functionEqualsTrue
 process where cidrMatch(source_address, "10.0.0.0/8") == true
 ;
diff --git a/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/parser/SqlBaseLexer.java b/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/parser/SqlBaseLexer.java
index 99b4cfed4c511..03cadeaaa2426 100644
--- a/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/parser/SqlBaseLexer.java
+++ b/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/parser/SqlBaseLexer.java
@@ -1,15 +1,13 @@
 // ANTLR GENERATED CODE: DO NOT EDIT
 package org.elasticsearch.xpack.sql.parser;
-import org.antlr.v4.runtime.CharStream;
 import org.antlr.v4.runtime.Lexer;
-import org.antlr.v4.runtime.RuntimeMetaData;
-import org.antlr.v4.runtime.Vocabulary;
-import org.antlr.v4.runtime.VocabularyImpl;
-import org.antlr.v4.runtime.atn.ATN;
-import org.antlr.v4.runtime.atn.ATNDeserializer;
-import org.antlr.v4.runtime.atn.LexerATNSimulator;
-import org.antlr.v4.runtime.atn.PredictionContextCache;
+import org.antlr.v4.runtime.CharStream;
+import org.antlr.v4.runtime.Token;
+import org.antlr.v4.runtime.TokenStream;
+import org.antlr.v4.runtime.*;
+import org.antlr.v4.runtime.atn.*;
 import org.antlr.v4.runtime.dfa.DFA;
+import org.antlr.v4.runtime.misc.*;
 
 @SuppressWarnings({"all", "warnings", "unchecked", "unused", "cast"})
 class SqlBaseLexer extends Lexer {