[PPL][analytics-engine-compatibility] Lower isempty/isblank to CHAR_LENGTH = 0 instead of multiset IS_EMPTY (#5439)

* [PPL] Lower isempty/isblank to CHAR_LENGTH = 0 instead of multiset IS_EMPTY

PPLFuncImpTable was emitting SqlStdOperatorTable.IS_EMPTY against string
operands as part of its isempty(x) / isblank(x) lowering. That operator
is the SQL:2003 multiset emptiness predicate — its OperandTypeChecker is
COLLECTION_OR_MAP and its enumerable-runtime binding calls
java.util.Collection.isEmpty() reflectively. Passing a string slipped
through only because RexBuilder.makeCall bypasses the operand checker
and Calcite's Linq4j codegen emits a bare `target.isEmpty()` that happens
to bind to String.isEmpty() at Janino compile time. Outside of the
script-pushdown path, the abuse breaks: any backend that does not run
RexNodes through Calcite's enumerable codegen — most notably Substrait
emitters such as the analytics-engine route — has no isthmus mapping
for SqlStdOperatorTable.IS_EMPTY and rejects the plan with
"unresolved function reference IS EMPTY".

Replace the lowering with the predicate that actually matches the doc:
  isempty(x) -> OR(IS_NULL(x), CHAR_LENGTH(x) = 0)
  isblank(x) -> OR(IS_NULL(x), CHAR_LENGTH(TRIM(BOTH ' ' FROM x)) = 0)

CHAR_LENGTH is a standard string operator with explicit type semantics,
backed by SqlFunctions.charLength(String) in Calcite's enumerable
runtime, and it round-trips through Substrait's default extension
catalog. Same observable behavior on existing PPL paths; correct
behavior on Substrait-based paths.

Also remove PredicateAnalyzer.containIsEmptyFunction. It existed solely
to abort DSL pushdown when it saw the OR(IS_NULL, IS_EMPTY) shape
because the SHOULD branches would NPE on null operands evaluating
.isEmpty() through the script. The new shape produces
OR(IS_NULL, CHAR_LENGTH = 0); the IS_NULL arm pushes down to
must_not.exists, the CHAR_LENGTH arm to a script that returns null
(not NPE) for null fields, and the SHOULD union answers correctly.

Test plan:
 - CalcitePPLConditionBuiltinFunctionIT.testIsEmpty / testIsBlank pass.
 - CalciteExplainIT.testExplainIsEmpty / testExplainIsBlank /
   testExplainIsEmptyOrOthers pass with regenerated golden plans for
   both pushdown-enabled and no-pushdown variants.
 - PredicateAnalyzerTest passes, including the unrelated
   equals_scriptPushDown_Struct test that still uses
   SqlStdOperatorTable.IS_EMPTY for its legitimate map-emptiness
   semantics.

Signed-off-by: Songkan Tang <songkant@amazon.com>

* [PPL] Strengthen isempty pushdown test to assert mixed-shape bool.should

The previous test (isNullOr_ScriptPushDown) only asserted that the builder
string contained the opensearch_compounded_script lang marker. With the
isempty -> OR(IS_NULL, CHAR_LENGTH=0) lowering, the IS_NULL arm now pushes
down as a native bool.must_not.exists clause and only the CHAR_LENGTH=0
arm remains a script — so the substring assertion still passed without
verifying the actual structure. Renamed and rewritten to assert:

  - Top-level builder is a BoolQueryBuilder with exactly two should arms
    and no must / top-level must_not clauses.
  - Arm 0 is a BoolQueryBuilder whose mustNot wraps an ExistsQueryBuilder
    (the IS_NULL lowering).
  - Arm 1 is a ScriptQueryBuilder using the opensearch_compounded_script
    lang (the CHAR_LENGTH=0 lowering).

Also documents inline why the prior containIsEmptyFunction NPE-prevention
detector is no longer needed: CHAR_LENGTH(null) follows Calcite's STRICT
null policy and returns null instead of NPE, so DSL's non-short-circuiting
should evaluation is safe.

Signed-off-by: Songkan Tang <songkant@amazon.com>

* Apply spotless line-wrap fix

Signed-off-by: Songkan Tang <songkant@amazon.com>

---------

Signed-off-by: Songkan Tang <songkant@amazon.com>

Author: songkant-aws

core/src/main/java/org/opensearch/sql/expression/function/PPLFuncImpTable.java

@@ -1278,14 +1278,30 @@ void populate() {
                       builder.makeNullLiteral(arg1.getType()),
                       arg1),
           PPLTypeChecker.wrapComparable((SameOperandTypeChecker) OperandTypes.SAME_SAME));
+      // PPL isempty(x) — TRUE iff x is NULL or an empty string. We express this as
+      //   OR(IS_NULL(x), CHAR_LENGTH(x) = 0)
+      // rather than reusing SqlStdOperatorTable.IS_EMPTY: the latter is the SQL:2003
+      // multiset/collection IS EMPTY predicate (its OperandTypeChecker is
+      // OperandTypes.COLLECTION_OR_MAP and its enumerable runtime calls
+      // java.util.Collection.isEmpty() reflectively). Passing a string operand only
+      // worked by coincidence — RexBuilder.makeCall bypasses the operand checker, and
+      // Calcite's enumerable codegen emits a bare `target.isEmpty()` call that happens
+      // to bind to String.isEmpty() at Janino compile time. The CHAR_LENGTH form makes
+      // the string semantics explicit, lets every backend translate the predicate
+      // through their normal length / equality bindings, and works on any code path
+      // that doesn't go through Calcite's enumerable runtime (e.g. Substrait emission
+      // for analytics-engine, which has no IS EMPTY mapping).
       register(
           IS_EMPTY,
           (FunctionImp1)
               (builder, arg) ->
                   builder.makeCall(
                       SqlStdOperatorTable.OR,
                       builder.makeCall(SqlStdOperatorTable.IS_NULL, arg),
-                      builder.makeCall(SqlStdOperatorTable.IS_EMPTY, arg)),
+                      builder.makeCall(
+                          SqlStdOperatorTable.EQUALS,
+                          builder.makeCall(SqlStdOperatorTable.CHAR_LENGTH, arg),
+                          builder.makeExactLiteral(BigDecimal.ZERO))),
           PPLTypeChecker.family(SqlTypeFamily.ANY));
       register(
           IS_BLANK,
@@ -1295,12 +1311,15 @@ void populate() {
                       SqlStdOperatorTable.OR,
                       builder.makeCall(SqlStdOperatorTable.IS_NULL, arg),
                       builder.makeCall(
-                          SqlStdOperatorTable.IS_EMPTY,
+                          SqlStdOperatorTable.EQUALS,
                           builder.makeCall(
-                              SqlStdOperatorTable.TRIM,
-                              builder.makeFlag(Flag.BOTH),
-                              builder.makeLiteral(" "),
-                              arg))),
+                              SqlStdOperatorTable.CHAR_LENGTH,
+                              builder.makeCall(
+                                  SqlStdOperatorTable.TRIM,
+                                  builder.makeFlag(Flag.BOTH),
+                                  builder.makeLiteral(" "),
+                                  arg)),
+                          builder.makeExactLiteral(BigDecimal.ZERO))),
           PPLTypeChecker.family(SqlTypeFamily.ANY));
       register(
           ILIKE,

integ-test/src/test/resources/expectedOutput/calcite/explain_isblank.yaml

@@ -2,7 +2,8 @@ calcite:
   logical: |
     LogicalSystemLimit(fetch=[10000], type=[QUERY_SIZE_LIMIT])
       LogicalProject(account_number=[$0], firstname=[$1], address=[$2], balance=[$3], gender=[$4], city=[$5], employer=[$6], state=[$7], age=[$8], email=[$9], lastname=[$10])
-        LogicalFilter(condition=[OR(IS NULL($1), IS EMPTY(TRIM(FLAG(BOTH), ' ', $1)))])
+        LogicalFilter(condition=[OR(IS NULL($1), =(CHAR_LENGTH(TRIM(FLAG(BOTH), ' ', $1)), 0))])
           CalciteLogicalIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]])
   physical: |
-    CalciteEnumerableIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]], PushDownContext=[[PROJECT->[account_number, firstname, address, balance, gender, city, employer, state, age, email, lastname], SCRIPT->OR(IS NULL($1), IS EMPTY(TRIM(FLAG(BOTH), ' ', $1))), LIMIT->10000], OpenSearchRequestBuilder(sourceBuilder={"from":0,"size":10000,"timeout":"1m","query":{"script":{"script":{"source":"{\"langType\":\"calcite\",\"script\":\"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\"}","lang":"opensearch_compounded_script","params":{"utcTimestamp": 0,"SOURCES":[0,2,0],"DIGESTS":["firstname.keyword"," ","firstname.keyword"]}},"boost":1.0}},"_source":{"includes":["account_number","firstname","address","balance","gender","city","employer","state","age","email","lastname"]}}, requestedTotalSize=10000, pageSize=null, startFrom=0)])
+    CalciteEnumerableIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]], PushDownContext=[[PROJECT->[account_number, firstname, address, balance, gender, city, employer, state, age, email, lastname], SCRIPT->OR(IS NULL($1), =(CHAR_LENGTH(TRIM(FLAG(BOTH), ' ', $1)), 0)), LIMIT->10000], OpenSearchRequestBuilder(sourceBuilder={"from":0,"size":10000,"timeout":"1m","query":{"bool":{"should":[{"bool":{"must_not":[{"exists":{"field":"firstname","boost":1.0}}],"adjust_pure_negative":true,"boost":1.0}},{"script":{"script":{"source":"{\"langType\":\"calcite\",\"script\":\"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\"}","lang":"opensearch_compounded_script","params":{"utcTimestamp":1778662429619956162,"SOURCES":[2,0,2],"DIGESTS":[" ","firstname.keyword",0]}},"boost":1.0}}],"adjust_pure_negative":true,"boost":1.0}},"_source":{"includes":["account_number","firstname","address","balance","gender","city","employer","state","age","email","lastname"]}}, requestedTotalSize=10000, pageSize=null, startFrom=0)])
+

integ-test/src/test/resources/expectedOutput/calcite/explain_isempty.yaml

@@ -2,7 +2,8 @@ calcite:
   logical: |
     LogicalSystemLimit(fetch=[10000], type=[QUERY_SIZE_LIMIT])
       LogicalProject(account_number=[$0], firstname=[$1], address=[$2], balance=[$3], gender=[$4], city=[$5], employer=[$6], state=[$7], age=[$8], email=[$9], lastname=[$10])
-        LogicalFilter(condition=[OR(IS NULL($1), IS EMPTY($1))])
+        LogicalFilter(condition=[OR(IS NULL($1), =(CHAR_LENGTH($1), 0))])
           CalciteLogicalIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]])
   physical: |
-    CalciteEnumerableIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]], PushDownContext=[[PROJECT->[account_number, firstname, address, balance, gender, city, employer, state, age, email, lastname], SCRIPT->OR(IS NULL($1), IS EMPTY($1)), LIMIT->10000], OpenSearchRequestBuilder(sourceBuilder={"from":0,"size":10000,"timeout":"1m","query":{"script":{"script":{"source":"{\"langType\":\"calcite\",\"script\":\"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\"}","lang":"opensearch_compounded_script","params":{"utcTimestamp": 0,"SOURCES":[0,0],"DIGESTS":["firstname.keyword","firstname.keyword"]}},"boost":1.0}},"_source":{"includes":["account_number","firstname","address","balance","gender","city","employer","state","age","email","lastname"]}}, requestedTotalSize=10000, pageSize=null, startFrom=0)])
+    CalciteEnumerableIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]], PushDownContext=[[PROJECT->[account_number, firstname, address, balance, gender, city, employer, state, age, email, lastname], SCRIPT->OR(IS NULL($1), =(CHAR_LENGTH($1), 0)), LIMIT->10000], OpenSearchRequestBuilder(sourceBuilder={"from":0,"size":10000,"timeout":"1m","query":{"bool":{"should":[{"bool":{"must_not":[{"exists":{"field":"firstname","boost":1.0}}],"adjust_pure_negative":true,"boost":1.0}},{"script":{"script":{"source":"{\"langType\":\"calcite\",\"script\":\"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\"}","lang":"opensearch_compounded_script","params":{"utcTimestamp":1778662435626872557,"SOURCES":[0,2],"DIGESTS":["firstname.keyword",0]}},"boost":1.0}}],"adjust_pure_negative":true,"boost":1.0}},"_source":{"includes":["account_number","firstname","address","balance","gender","city","employer","state","age","email","lastname"]}}, requestedTotalSize=10000, pageSize=null, startFrom=0)])
+

integ-test/src/test/resources/expectedOutput/calcite/explain_isempty_or_others.yaml

@@ -2,7 +2,8 @@ calcite:
   logical: |
     LogicalSystemLimit(fetch=[10000], type=[QUERY_SIZE_LIMIT])
       LogicalProject(account_number=[$0], firstname=[$1], address=[$2], balance=[$3], gender=[$4], city=[$5], employer=[$6], state=[$7], age=[$8], email=[$9], lastname=[$10])
-        LogicalFilter(condition=[OR(=($4, 'M'), IS NULL($1), IS EMPTY($1))])
+        LogicalFilter(condition=[OR(=($4, 'M'), IS NULL($1), =(CHAR_LENGTH($1), 0))])
           CalciteLogicalIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]])
   physical: |
-    CalciteEnumerableIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]], PushDownContext=[[PROJECT->[account_number, firstname, address, balance, gender, city, employer, state, age, email, lastname], SCRIPT->OR(IS NULL($1), =($4, 'M'), IS EMPTY($1)), LIMIT->10000], OpenSearchRequestBuilder(sourceBuilder={"from":0,"size":10000,"timeout":"1m","query":{"script":{"script":{"source":"{\"langType\":\"calcite\",\"script\":\"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\"}","lang":"opensearch_compounded_script","params":{"utcTimestamp": 0,"SOURCES":[0,0,2,0],"DIGESTS":["firstname.keyword","gender.keyword","M","firstname.keyword"]}},"boost":1.0}},"_source":{"includes":["account_number","firstname","address","balance","gender","city","employer","state","age","email","lastname"]}}, requestedTotalSize=10000, pageSize=null, startFrom=0)])
+    CalciteEnumerableIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]], PushDownContext=[[PROJECT->[account_number, firstname, address, balance, gender, city, employer, state, age, email, lastname], SCRIPT->OR(IS NULL($1), =($4, 'M'), =(CHAR_LENGTH($1), 0)), LIMIT->10000], OpenSearchRequestBuilder(sourceBuilder={"from":0,"size":10000,"timeout":"1m","query":{"bool":{"should":[{"bool":{"must_not":[{"exists":{"field":"firstname","boost":1.0}}],"adjust_pure_negative":true,"boost":1.0}},{"term":{"gender.keyword":{"value":"M","boost":1.0}}},{"script":{"script":{"source":"{\"langType\":\"calcite\",\"script\":\"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\"}","lang":"opensearch_compounded_script","params":{"utcTimestamp":1778662435212192100,"SOURCES":[0,2],"DIGESTS":["firstname.keyword",0]}},"boost":1.0}}],"adjust_pure_negative":true,"boost":1.0}},"_source":{"includes":["account_number","firstname","address","balance","gender","city","employer","state","age","email","lastname"]}}, requestedTotalSize=10000, pageSize=null, startFrom=0)])
+

integ-test/src/test/resources/expectedOutput/calcite_no_pushdown/explain_isblank.yaml

@@ -2,9 +2,9 @@ calcite:
   logical: |
     LogicalSystemLimit(fetch=[10000], type=[QUERY_SIZE_LIMIT])
       LogicalProject(account_number=[$0], firstname=[$1], address=[$2], balance=[$3], gender=[$4], city=[$5], employer=[$6], state=[$7], age=[$8], email=[$9], lastname=[$10])
-        LogicalFilter(condition=[OR(IS NULL($1), IS EMPTY(TRIM(FLAG(BOTH), ' ', $1)))])
+        LogicalFilter(condition=[OR(IS NULL($1), =(CHAR_LENGTH(TRIM(FLAG(BOTH), ' ', $1)), 0))])
           CalciteLogicalIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]])
   physical: |
     EnumerableLimit(fetch=[10000])
-      EnumerableCalc(expr#0..16=[{inputs}], expr#17=[IS NULL($t1)], expr#18=[FLAG(BOTH)], expr#19=[' '], expr#20=[TRIM($t18, $t19, $t1)], expr#21=[IS EMPTY($t20)], expr#22=[OR($t17, $t21)], proj#0..10=[{exprs}], $condition=[$t22])
+      EnumerableCalc(expr#0..16=[{inputs}], expr#17=[IS NULL($t1)], expr#18=[FLAG(BOTH)], expr#19=[' '], expr#20=[TRIM($t18, $t19, $t1)], expr#21=[CHAR_LENGTH($t20)], expr#22=[0], expr#23=[=($t21, $t22)], expr#24=[OR($t17, $t23)], proj#0..10=[{exprs}], $condition=[$t24])
         CalciteEnumerableIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]])

integ-test/src/test/resources/expectedOutput/calcite_no_pushdown/explain_isempty.yaml

@@ -2,9 +2,9 @@ calcite:
   logical: |
     LogicalSystemLimit(fetch=[10000], type=[QUERY_SIZE_LIMIT])
       LogicalProject(account_number=[$0], firstname=[$1], address=[$2], balance=[$3], gender=[$4], city=[$5], employer=[$6], state=[$7], age=[$8], email=[$9], lastname=[$10])
-        LogicalFilter(condition=[OR(IS NULL($1), IS EMPTY($1))])
+        LogicalFilter(condition=[OR(IS NULL($1), =(CHAR_LENGTH($1), 0))])
           CalciteLogicalIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]])
   physical: |
     EnumerableLimit(fetch=[10000])
-      EnumerableCalc(expr#0..16=[{inputs}], expr#17=[IS NULL($t1)], expr#18=[IS EMPTY($t1)], expr#19=[OR($t17, $t18)], proj#0..10=[{exprs}], $condition=[$t19])
+      EnumerableCalc(expr#0..16=[{inputs}], expr#17=[IS NULL($t1)], expr#18=[CHAR_LENGTH($t1)], expr#19=[0], expr#20=[=($t18, $t19)], expr#21=[OR($t17, $t20)], proj#0..10=[{exprs}], $condition=[$t21])
         CalciteEnumerableIndexScan(table=[[OpenSearch, opensearch-sql_test_index_account]])