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branch-4.0: [feature](func) Support MID function #56446 #56875

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Merged
yiguolei merged 1 commit into from
Oct 16, 2025
Merged

branch-4.0: [feature](func) Support MID function #56446 #56875

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1 change: 1 addition & 0 deletions be/src/vec/functions/function_string.cpp
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Expand Up @@ -1480,6 +1480,7 @@ void register_function_string(SimpleFunctionFactory& factory) {
factory.register_alias(FunctionLeft::name, "strleft");
factory.register_alias(FunctionRight::name, "strright");
factory.register_alias(SubstringUtil::name, "substr");
factory.register_alias(SubstringUtil::name, "mid");
factory.register_alias(FunctionToLower::name, "lcase");
factory.register_alias(FunctionToUpper::name, "ucase");
factory.register_alias(FunctionStringDigestOneArg<MD5Sum>::name, "md5");
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1 change: 1 addition & 0 deletions fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisLexer.g4
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Expand Up @@ -351,6 +351,7 @@ MAX: 'MAX';
MAXVALUE: 'MAXVALUE';
MEMO:'MEMO';
MERGE: 'MERGE';
MID: 'MID';
MIGRATE: 'MIGRATE';
MIGRATIONS: 'MIGRATIONS';
MIN: 'MIN';
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3 changes: 2 additions & 1 deletion fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
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Expand Up @@ -1603,7 +1603,7 @@ primaryExpression
(OVER windowSpec)? #groupConcat
| TRIM LEFT_PAREN
((BOTH | LEADING | TRAILING) expression? | expression) FROM expression RIGHT_PAREN #trim
| (SUBSTR | SUBSTRING) LEFT_PAREN
| (SUBSTR | SUBSTRING | MID) LEFT_PAREN
expression FROM expression (FOR expression)? RIGHT_PAREN #substring
| POSITION LEFT_PAREN expression IN expression RIGHT_PAREN #position
| functionCallExpression #functionCall
Expand Down Expand Up @@ -2059,6 +2059,7 @@ nonReserved
| MAX
| MEMO
| MERGE
| MID
| MIGRATE
| MIGRATIONS
| MIN
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2 changes: 1 addition & 1 deletion fe/fe-core/src/main/java/org/apache/doris/catalog/BuiltinScalarFunctions.java
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Expand Up @@ -968,7 +968,7 @@ public class BuiltinScalarFunctions implements FunctionHelper {
scalar(StrToMap.class, "str_to_map"),
scalar(SubBitmap.class, "sub_bitmap"),
scalar(SubReplace.class, "sub_replace"),
scalar(Substring.class, "substr", "substring"),
scalar(Substring.class, "substr", "substring", "mid"),
scalar(SubstringIndex.class, "substring_index"),
scalar(Tan.class, "tan"),
scalar(Tanh.class, "tanh"),
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Binary file modified regression-test/data/query_p0/sql_functions/string_functions/test_string_function.out
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30 changes: 30 additions & 0 deletions ...on-test/suites/nereids_p0/expression/fold_constant/fold_constant_string_arithmatic.groovy
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Expand Up @@ -1338,6 +1338,36 @@ suite("fold_constant_string_arithmatic") {
testFoldConst("select substring('abcdef' FROM 3)")
testFoldConst("select substring('' FROM 3)")

// mid
testFoldConst("select mid('a',0,1)")
testFoldConst("select mid('a',-1,1)")
testFoldConst("select mid('a',1,1)")
testFoldConst("select mid('a',-2,1)")
testFoldConst("select mid('a',2,1)")
testFoldConst("select mid('a',-3,1)")
testFoldConst("select mid('a',3,1)")
testFoldConst("select mid('abcdef',-3,-1)")
testFoldConst("select mid('abcdef',3,-1)")
testFoldConst("select mid('',3,-1)")
testFoldConst("select mid('abcdef',3,10)")
testFoldConst("select mid('abcdef',-3)")
testFoldConst("select mid('abcdef',3)")
testFoldConst("select mid('',3)")
testFoldConst("select mid('a' FROM 0 FOR 1)")
testFoldConst("select mid('a' FROM -1 FOR 1)")
testFoldConst("select mid('a' FROM 1 FOR 1)")
testFoldConst("select mid('a' FROM -2 FOR 1)")
testFoldConst("select mid('a' FROM 2 FOR 1)")
testFoldConst("select mid('a' FROM -3 FOR 1)")
testFoldConst("select mid('a' FROM 3 FOR 1)")
testFoldConst("select mid('abcdef' FROM -3 FOR -1)")
testFoldConst("select mid('abcdef' FROM 3 FOR -1)")
testFoldConst("select mid('' FROM 3 FOR -1)")
testFoldConst("select mid('abcdef' FROM 3 FOR 10)")
testFoldConst("select mid('abcdef' FROM -3)")
testFoldConst("select mid('abcdef' FROM 3)")
testFoldConst("select mid('' FROM 3)")

// substring_index
testFoldConst("select substring_index('a,b,c', ',', 2)")
testFoldConst("select substring_index('a,b,c', '', 2)")
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35 changes: 35 additions & 0 deletions regression-test/suites/query_p0/sql_functions/string_functions/test_string_function.groovy
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Expand Up @@ -288,6 +288,41 @@ suite("test_string_function", "arrow_flight_sql") {
qt_sql "select substr('abcdef',3,-1);"
qt_sql "select substr('abcdef',-3,-1);"

qt_mid_1 "select mid('a',0,1);"
qt_mid_2 "select mid('a',-1,1);"
qt_mid_3 "select mid('a',1,1);"
qt_mid_4 "select mid('a',-2,1);"
qt_mid_5 "select mid('a',2,1);"
qt_mid_6 "select mid('a',-3,1);"
qt_mid_7 "select mid('a',3,1);"
qt_mid_8 "select mid('abcdef',-3,-1);"
qt_mid_9 "select mid('abcdef',3,-1);"
qt_mid_10 "select mid('',3,-1);"
qt_mid_11 "select mid('abcdef',3,10);"
qt_mid_12 "select mid('abcdef',-3);"
qt_mid_13 "select mid('abcdef',3);"
qt_mid_14 "select mid('',3);"
qt_mid_15 "select mid('a' FROM 0 FOR 1);"
qt_mid_16 "select mid('a' FROM -1 FOR 1);"
qt_mid_17 "select mid('a' FROM 1 FOR 1);"
qt_mid_18 "select mid('a' FROM -2 FOR 1);"
qt_mid_19 "select mid('a' FROM 2 FOR 1);"
qt_mid_20 "select mid('a' FROM -3 FOR 1);"
qt_mid_21 "select mid('a' FROM 3 FOR 1);"
qt_mid_22 "select mid('abcdef' FROM -3 FOR -1);"
qt_mid_23 "select mid('abcdef' FROM 3 FOR -1);"
qt_mid_24 "select mid('' FROM 3 FOR -1);"
qt_mid_25 "select mid('abcdef' FROM 3 FOR 10);"
qt_mid_26 "select mid('abcdef' FROM -3);"
qt_mid_27 "select mid('abcdef' FROM 3);"
qt_mid_28 "select mid('' FROM 3);"
qt_mid_29 "select mid(NULL, 2);"
qt_mid_30 "select mid(NULL, 2, 3)"
qt_mid_31 "select mid(NULL FROM 2);"
qt_mid_32 "select mid(NULL FROM 2 FOR 3);"
qt_mid_33 "select mid('hello', NULL);"
qt_mid_34 "select mid('hello', 2, NULL);"

qt_sql "select sub_replace(\"this is origin str\",\"NEW-STR\",1);"
qt_sql "select sub_replace(\"doris\",\"***\",1,2);"

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