| /* |
| Copyright 2020 Google LLC |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| package spansql |
| |
| import ( |
| "strings" |
| ) |
| |
| // IsKeyword reports whether the identifier is a reserved keyword. |
| func IsKeyword(id string) bool { |
| return keywords[strings.ToUpper(id)] |
| } |
| |
| // keywords is the set of reserved keywords. |
| // https://cloud.google.com/spanner/docs/lexical#reserved-keywords |
| var keywords = map[string]bool{ |
| "ALL": true, |
| "AND": true, |
| "ANY": true, |
| "ARRAY": true, |
| "AS": true, |
| "ASC": true, |
| "ASSERT_ROWS_MODIFIED": true, |
| "AT": true, |
| "BETWEEN": true, |
| "BY": true, |
| "CASE": true, |
| "CAST": true, |
| "COLLATE": true, |
| "CONTAINS": true, |
| "CREATE": true, |
| "CROSS": true, |
| "CUBE": true, |
| "CURRENT": true, |
| "DEFAULT": true, |
| "DEFINE": true, |
| "DESC": true, |
| "DISTINCT": true, |
| "ELSE": true, |
| "END": true, |
| "ENUM": true, |
| "ESCAPE": true, |
| "EXCEPT": true, |
| "EXCLUDE": true, |
| "EXISTS": true, |
| "EXTRACT": true, |
| "FALSE": true, |
| "FETCH": true, |
| "FOLLOWING": true, |
| "FOR": true, |
| "FROM": true, |
| "FULL": true, |
| "GROUP": true, |
| "GROUPING": true, |
| "GROUPS": true, |
| "HASH": true, |
| "HAVING": true, |
| "IF": true, |
| "IGNORE": true, |
| "IN": true, |
| "INNER": true, |
| "INTERSECT": true, |
| "INTERVAL": true, |
| "INTO": true, |
| "IS": true, |
| "JOIN": true, |
| "LATERAL": true, |
| "LEFT": true, |
| "LIKE": true, |
| "LIMIT": true, |
| "LOOKUP": true, |
| "MERGE": true, |
| "NATURAL": true, |
| "NEW": true, |
| "NO": true, |
| "NOT": true, |
| "NULL": true, |
| "NULLS": true, |
| "OF": true, |
| "ON": true, |
| "OR": true, |
| "ORDER": true, |
| "OUTER": true, |
| "OVER": true, |
| "PARTITION": true, |
| "PRECEDING": true, |
| "PROTO": true, |
| "RANGE": true, |
| "RECURSIVE": true, |
| "RESPECT": true, |
| "RIGHT": true, |
| "ROLLUP": true, |
| "ROWS": true, |
| "SELECT": true, |
| "SET": true, |
| "SOME": true, |
| "STRUCT": true, |
| "TABLESAMPLE": true, |
| "THEN": true, |
| "TO": true, |
| "TREAT": true, |
| "TRUE": true, |
| "UNBOUNDED": true, |
| "UNION": true, |
| "UNNEST": true, |
| "USING": true, |
| "WHEN": true, |
| "WHERE": true, |
| "WINDOW": true, |
| "WITH": true, |
| "WITHIN": true, |
| } |
| |
| // funcs is the set of reserved keywords that are functions. |
| // https://cloud.google.com/spanner/docs/functions-and-operators |
| var funcs = make(map[string]bool) |
| var funcArgParsers = make(map[string]func(*parser) (Expr, *parseError)) |
| var aggregateFuncs = make(map[string]bool) |
| |
| func init() { |
| for _, f := range funcNames { |
| funcs[f] = true |
| } |
| for _, f := range aggregateFuncNames { |
| funcs[f] = true |
| aggregateFuncs[f] = true |
| } |
| // Special case for CAST, SAFE_CAST and EXTRACT |
| funcArgParsers["CAST"] = typedArgParser |
| funcArgParsers["SAFE_CAST"] = typedArgParser |
| funcArgParsers["EXTRACT"] = extractArgParser |
| // Spacial case of INTERVAL arg for DATE_ADD, DATE_SUB, GENERATE_DATE_ARRAY |
| funcArgParsers["DATE_ADD"] = dateIntervalArgParser |
| funcArgParsers["DATE_SUB"] = dateIntervalArgParser |
| funcArgParsers["GENERATE_DATE_ARRAY"] = dateIntervalArgParser |
| // Spacial case of INTERVAL arg for TIMESTAMP_ADD, TIMESTAMP_SUB |
| funcArgParsers["TIMESTAMP_ADD"] = timestampIntervalArgParser |
| funcArgParsers["TIMESTAMP_SUB"] = timestampIntervalArgParser |
| // Special case of SEQUENCE arg for GET_NEXT_SEQUENCE_VALUE, GET_INTERNAL_SEQUENCE_STATE |
| funcArgParsers["GET_NEXT_SEQUENCE_VALUE"] = sequenceArgParser |
| funcArgParsers["GET_INTERNAL_SEQUENCE_STATE"] = sequenceArgParser |
| } |
| |
| var funcNames = []string{ |
| // TODO: many more |
| |
| // Cast functions. |
| "CAST", |
| "SAFE_CAST", |
| |
| // Mathematical functions. |
| "ABS", |
| "ACOS", |
| "ACOSH", |
| "ASIN", |
| "ASINH", |
| "ATAN", |
| "ATAN2", |
| "ATANH", |
| "CEIL", |
| "CEILING", |
| "COS", |
| "COSH", |
| "DIV", |
| "EXP", |
| "FLOOR", |
| "GREATEST", |
| "IEEE_DIVIDE", |
| "IS_INF", |
| "IS_NAN", |
| "LEAST", |
| "LN", |
| "LOG", |
| "LOG10", |
| "MOD", |
| "POW", |
| "POWER", |
| "ROUND", |
| "SAFE_ADD", |
| "SAFE_DIVIDE", |
| "SAFE_MULTIPLY", |
| "SAFE_NEGATE", |
| "SAFE_SUBTRACT", |
| "SIGN", |
| "SIN", |
| "SINH", |
| "SQRT", |
| "TAN", |
| "TANH", |
| "TRUNC", |
| |
| // Hash functions. |
| "FARM_FINGERPRINT", |
| "SHA1", |
| "SHA256", "SHA512", |
| |
| // String functions. |
| "BYTE_LENGTH", "CHAR_LENGTH", "CHARACTER_LENGTH", |
| "CODE_POINTS_TO_BYTES", "CODE_POINTS_TO_STRING", |
| "CONCAT", |
| "ENDS_WITH", |
| "FORMAT", |
| "FROM_BASE32", "FROM_BASE64", "FROM_HEX", |
| "LENGTH", |
| "LOWER", |
| "LPAD", |
| "LTRIM", |
| "REGEXP_CONTAINS", "REGEXP_EXTRACT", "REGEXP_EXTRACT_ALL", "REGEXP_REPLACE", |
| "REPEAT", |
| "REPLACE", |
| "REVERSE", |
| "RPAD", |
| "RTRIM", |
| "SAFE_CONVERT_BYTES_TO_STRING", |
| "SPLIT", |
| "STARTS_WITH", |
| "STRPOS", |
| "SUBSTR", |
| "TO_BASE32", "TO_BASE64", "TO_CODE_POINTS", "TO_HEX", |
| "TRIM", |
| "UPPER", |
| |
| // Array functions. |
| "ARRAY", |
| "ARRAY_CONCAT", |
| "ARRAY_FIRST", "ARRAY_INCLUDES", "ARRAY_INCLUDES_ALL", "ARRAY_INCLUDES_ANY", "ARRAY_LAST", |
| "ARRAY_LENGTH", |
| "ARRAY_MAX", "ARRAY_MIN", "ARRAY_REVERSE", "ARRAY_SLICE", "ARRAY_TRANSFORM", |
| "ARRAY_TO_STRING", |
| "GENERATE_ARRAY", "GENERATE_DATE_ARRAY", |
| "OFFSET", "ORDINAL", |
| "ARRAY_REVERSE", |
| "ARRAY_IS_DISTINCT", |
| "SAFE_OFFSET", "SAFE_ORDINAL", |
| |
| // Date functions. |
| "CURRENT_DATE", |
| "EXTRACT", |
| "DATE", |
| "DATE_ADD", |
| "DATE_SUB", |
| "DATE_DIFF", |
| "DATE_TRUNC", |
| "DATE_FROM_UNIX_DATE", |
| "FORMAT_DATE", |
| "PARSE_DATE", |
| "UNIX_DATE", |
| |
| // Timestamp functions. |
| "CURRENT_TIMESTAMP", |
| "STRING", |
| "TIMESTAMP", |
| "TIMESTAMP_ADD", |
| "TIMESTAMP_SUB", |
| "TIMESTAMP_DIFF", |
| "TIMESTAMP_TRUNC", |
| "FORMAT_TIMESTAMP", |
| "PARSE_TIMESTAMP", |
| "TIMESTAMP_SECONDS", |
| "TIMESTAMP_MILLIS", |
| "TIMESTAMP_MICROS", |
| "UNIX_SECONDS", |
| "UNIX_MILLIS", |
| "UNIX_MICROS", |
| "PENDING_COMMIT_TIMESTAMP", |
| |
| // JSON functions. |
| "JSON_QUERY", |
| "JSON_VALUE", |
| "JSON_QUERY_ARRAY", |
| "JSON_VALUE_ARRAY", |
| |
| // Bit functions. |
| "BIT_COUNT", |
| "BIT_REVERSE", |
| |
| // Sequence functions. |
| "GET_NEXT_SEQUENCE_VALUE", |
| "GET_INTERNAL_SEQUENCE_STATE", |
| |
| // Utility functions. |
| "GENERATE_UUID", |
| } |
| |
| var aggregateFuncNames = []string{ |
| // Aggregate functions. |
| "ANY_VALUE", |
| "ARRAY_AGG", |
| "ARRAY_CONCAT_AGG", |
| "AVG", |
| "BIT_AND", |
| "BIT_OR", |
| "BIT_XOR", |
| "COUNT", |
| "COUNTIF", |
| "LOGICAL_AND", |
| "LOGICAL_OR", |
| "MAX", |
| "MIN", |
| "STRING_AGG", |
| "SUM", |
| |
| // Statistical aggregate functions. |
| "STDDEV", |
| "STDDEV_SAMP", |
| "VAR_SAMP", |
| "VARIANCE", |
| } |
