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[Coral-Trino] Avoid accidental translation of Trino
from_unixtime S…
…QL call (#467) Co-authored-by: Walaa Eldin Moustafa <wmoustafa@linkedin.com>
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...-hive/src/main/java/com/linkedin/coral/hive/hive2rel/functions/TimestampFromUnixtime.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| /** | ||
| * Copyright 2023 LinkedIn Corporation. All rights reserved. | ||
| * Licensed under the BSD-2 Clause license. | ||
| * See LICENSE in the project root for license information. | ||
| */ | ||
| package com.linkedin.coral.hive.hive2rel.functions; | ||
|
|
||
| import org.apache.calcite.sql.SqlCall; | ||
| import org.apache.calcite.sql.SqlCallBinding; | ||
| import org.apache.calcite.sql.SqlFunction; | ||
| import org.apache.calcite.sql.SqlFunctionCategory; | ||
| import org.apache.calcite.sql.SqlIdentifier; | ||
| import org.apache.calcite.sql.SqlLiteral; | ||
| import org.apache.calcite.sql.SqlNode; | ||
| import org.apache.calcite.sql.SqlOperandCountRange; | ||
| import org.apache.calcite.sql.SqlUtil; | ||
| import org.apache.calcite.sql.SqlWriter; | ||
| import org.apache.calcite.sql.parser.SqlParserPos; | ||
| import org.apache.calcite.sql.type.OperandTypes; | ||
| import org.apache.calcite.sql.type.SqlOperandCountRanges; | ||
| import org.apache.calcite.sql.type.SqlTypeFamily; | ||
| import org.apache.calcite.sql.type.SqlTypeName; | ||
|
|
||
| import static org.apache.calcite.sql.type.ReturnTypes.explicit; | ||
|
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|
|
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| public class TimestampFromUnixtime extends SqlFunction { | ||
|
|
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| public static final TimestampFromUnixtime TIMESTAMP_FROM_UNIXTIME = new TimestampFromUnixtime(); | ||
|
|
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| private TimestampFromUnixtime() { | ||
| super(new SqlIdentifier("timestamp_from_unixtime", SqlParserPos.ZERO), explicit(SqlTypeName.TIMESTAMP), null, null, | ||
| null, SqlFunctionCategory.TIMEDATE); | ||
| } | ||
|
|
||
| @Override | ||
| public SqlOperandCountRange getOperandCountRange() { | ||
| return SqlOperandCountRanges.between(1, 3); | ||
| } | ||
|
|
||
| @Override | ||
| public boolean checkOperandTypes(SqlCallBinding callBinding, boolean throwOnFailure) { | ||
| final SqlNode firstOperand = callBinding.operand(0); | ||
| if (!OperandTypes.family(SqlTypeFamily.NUMERIC).checkSingleOperandType(callBinding, firstOperand, 0, | ||
| throwOnFailure)) { | ||
| return false; | ||
| } | ||
|
|
||
| if (callBinding.getOperandCount() == 2) { | ||
| final SqlNode secondOperand = callBinding.operand(1); | ||
| if (!OperandTypes.family(SqlTypeFamily.STRING).checkSingleOperandType(callBinding, secondOperand, 0, | ||
| throwOnFailure)) { | ||
| return false; | ||
| } | ||
| } | ||
|
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||
| if (callBinding.getOperandCount() == 3) { | ||
| final SqlNode secondOperand = callBinding.operand(1); | ||
| final SqlNode thirdOperand = callBinding.operand(2); | ||
| if (!OperandTypes.family(SqlTypeFamily.NUMERIC).checkSingleOperandType(callBinding, secondOperand, 0, | ||
| throwOnFailure)) { | ||
| return false; | ||
| } | ||
| if (!OperandTypes.family(SqlTypeFamily.NUMERIC).checkSingleOperandType(callBinding, thirdOperand, 0, | ||
| throwOnFailure)) { | ||
| return false; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
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||
| @Override | ||
| public void unparse(SqlWriter writer, SqlCall call, int leftPrec, int rightPrec) { | ||
| SqlUtil.unparseSqlIdentifierSyntax(writer, new SqlIdentifier("from_unixtime", SqlParserPos.ZERO), true); | ||
| final SqlWriter.Frame frame = writer.startList(SqlWriter.FrameTypeEnum.FUN_CALL, "(", ")"); | ||
| final SqlLiteral quantifier = call.getFunctionQuantifier(); | ||
| if (quantifier != null) { | ||
| quantifier.unparse(writer, 0, 0); | ||
| } | ||
| for (SqlNode operand : call.getOperandList()) { | ||
| writer.sep(","); | ||
| operand.unparse(writer, 0, 0); | ||
| } | ||
| writer.endList(frame); | ||
| } | ||
| } |
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