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64 lines
1.1 KiB
Go
64 lines
1.1 KiB
Go
package lang
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// TODO: This logic is PostgreSQL-specific and needs to be refactored to support MySQL
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func IsComparisonOperator(s string) bool {
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switch s {
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case ">":
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case "<":
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case "<=":
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case ">=":
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case "=":
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case "==":
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case "<>":
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case "!=":
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// Comparisons an engine spells as a keyword rather than as punctuation.
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// They are written upper case, which is how SQLite's parser records
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// them; PostgreSQL and MySQL use distinct node types or their own
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// operator names for these, so the spellings do not overlap.
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case "IS":
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case "IS NOT":
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case "IS DISTINCT FROM":
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case "IS NOT DISTINCT FROM":
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case "ISNULL":
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case "NOTNULL":
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case "NOT NULL":
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case "LIKE":
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case "NOT LIKE":
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case "GLOB":
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case "NOT GLOB":
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case "REGEXP":
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case "NOT REGEXP":
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case "MATCH":
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case "NOT MATCH":
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default:
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return false
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}
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return true
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}
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func IsMathematicalOperator(s string) bool {
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switch s {
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case "+":
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case "-":
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case "*":
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case "/":
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case "%":
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case "^":
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case "|/":
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case "||/":
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case "!":
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case "!!":
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case "@":
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case "&":
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case "|":
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case "#":
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case "~":
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case "<<":
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case ">>":
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default:
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return false
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}
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return true
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}
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