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Implement STARTSWITH, ENDSWITH functions

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Pijus Kamandulis
2024-02-21 20:46:08 +02:00
parent 9bf3dc22ed
commit 790192bf5a
7 changed files with 460 additions and 203 deletions
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parsers/nosql/nosql.peg
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@@ -306,7 +306,11 @@ BooleanLiteral <- ("true"i / "false"i) {
return parsers.Constant{Type: parsers.ConstantTypeBoolean, Value: boolValue}, nil
}
FunctionCall <- StringEqualsExpression / ConcatExpression / ContainsExpression / IsDefined
FunctionCall <- StringFunctions / IsDefined
StringFunctions <- StringEqualsExpression
/ ConcatExpression
/ ThreeArgumentStringFunctionExpression
StringEqualsExpression <- StringEquals ws "(" ws ex1:SelectItem ws "," ws ex2:SelectItem ws ignoreCase:("," ws boolean:SelectItem { return boolean, nil })? ")" {
return parsers.FunctionCall{Type: parsers.FunctionCallStringEquals, Arguments: []interface{}{ex1, ex2, ignoreCase}}, nil
@@ -317,10 +321,24 @@ ConcatExpression <- "CONCAT"i ws "(" ws ex1:SelectItem others:(ws "," ws ex:Sele
return parsers.FunctionCall{Type: parsers.FunctionCallConcat, Arguments: arguments}, nil
}
ContainsExpression <- "CONTAINS"i ws "(" ws ex1:SelectItem ws "," ws ex2:SelectItem ws ignoreCase:("," ws boolean:SelectItem { return boolean, nil })? ")" {
return parsers.FunctionCall{Type: parsers.FunctionCallContains, Arguments: []interface{}{ex1, ex2, ignoreCase}}, nil
ThreeArgumentStringFunctionExpression <- function:ThreeArgumentStringFunction ws "(" ws ex1:SelectItem ws "," ws ex2:SelectItem ws ignoreCase:("," ws boolean:SelectItem { return boolean, nil })? ")" {
var functionType parsers.FunctionCallType
lowerFunction := strings.ToUpper(function.(string))
switch lowerFunction {
case "CONTAINS":
functionType = parsers.FunctionCallContains
case "ENDSWITH":
functionType = parsers.FunctionCallEndsWith
case "STARTSWITH":
functionType = parsers.FunctionCallStartsWith
}
return parsers.FunctionCall{Type: functionType, Arguments: []interface{}{ex1, ex2, ignoreCase}}, nil
}
ThreeArgumentStringFunction <- "CONTAINS"i / "ENDSWITH"i / "STARTSWITH"i
IsDefined <- "IS_DEFINED"i ws "(" ws ex:SelectItem ws ")" {
return parsers.FunctionCall{Type: parsers.FunctionCallIsDefined, Arguments: []interface{}{ex}}, nil
}