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cac7658205
This provides a mechanism for specifying conversions between SQL data types and procedural languages. As examples, there are transforms for hstore and ltree for PL/Perl and PL/Python. reviews by Pavel Stěhule and Andres Freund
99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* ecpg_keywords.c
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* lexical token lookup for reserved words in postgres embedded SQL
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*
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* IDENTIFICATION
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* src/interfaces/ecpg/preproc/ecpg_keywords.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres_fe.h"
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#include <ctype.h>
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#include "extern.h"
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#include "preproc.h"
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/*
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* List of (keyword-name, keyword-token-value) pairs.
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*
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* !!WARNING!!: This list must be sorted, because binary
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* search is used to locate entries.
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*/
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static const ScanKeyword ECPGScanKeywords[] = {
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/* name, value, category */
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/*
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* category is not needed in ecpg, it is only here so we can share the
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* data structure with the backend
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*/
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{"allocate", SQL_ALLOCATE, 0},
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{"autocommit", SQL_AUTOCOMMIT, 0},
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{"bool", SQL_BOOL, 0},
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{"break", SQL_BREAK, 0},
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{"call", SQL_CALL, 0},
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{"cardinality", SQL_CARDINALITY, 0},
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{"connect", SQL_CONNECT, 0},
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{"count", SQL_COUNT, 0},
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{"datetime_interval_code", SQL_DATETIME_INTERVAL_CODE, 0},
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{"datetime_interval_precision", SQL_DATETIME_INTERVAL_PRECISION, 0},
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{"describe", SQL_DESCRIBE, 0},
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{"descriptor", SQL_DESCRIPTOR, 0},
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{"disconnect", SQL_DISCONNECT, 0},
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{"found", SQL_FOUND, 0},
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{"free", SQL_FREE, 0},
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{"get", SQL_GET, 0},
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{"go", SQL_GO, 0},
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{"goto", SQL_GOTO, 0},
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{"identified", SQL_IDENTIFIED, 0},
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{"indicator", SQL_INDICATOR, 0},
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{"key_member", SQL_KEY_MEMBER, 0},
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{"length", SQL_LENGTH, 0},
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{"long", SQL_LONG, 0},
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{"nullable", SQL_NULLABLE, 0},
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{"octet_length", SQL_OCTET_LENGTH, 0},
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{"open", SQL_OPEN, 0},
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{"output", SQL_OUTPUT, 0},
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{"reference", SQL_REFERENCE, 0},
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{"returned_length", SQL_RETURNED_LENGTH, 0},
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{"returned_octet_length", SQL_RETURNED_OCTET_LENGTH, 0},
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{"scale", SQL_SCALE, 0},
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{"section", SQL_SECTION, 0},
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{"short", SQL_SHORT, 0},
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{"signed", SQL_SIGNED, 0},
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{"sqlerror", SQL_SQLERROR, 0},
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{"sqlprint", SQL_SQLPRINT, 0},
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{"sqlwarning", SQL_SQLWARNING, 0},
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{"stop", SQL_STOP, 0},
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{"struct", SQL_STRUCT, 0},
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{"unsigned", SQL_UNSIGNED, 0},
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{"var", SQL_VAR, 0},
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{"whenever", SQL_WHENEVER, 0},
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};
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/*
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* ScanECPGKeywordLookup - see if a given word is a keyword
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*
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* Returns a pointer to the ScanKeyword table entry, or NULL if no match.
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* Keywords are matched using the same case-folding rules as in the backend.
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*/
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const ScanKeyword *
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ScanECPGKeywordLookup(const char *text)
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{
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const ScanKeyword *res;
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/* First check SQL symbols defined by the backend. */
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res = ScanKeywordLookup(text, SQLScanKeywords, NumSQLScanKeywords);
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if (res)
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return res;
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/* Try ECPG-specific keywords. */
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res = ScanKeywordLookup(text, ECPGScanKeywords, lengthof(ECPGScanKeywords));
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if (res)
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return res;
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return NULL;
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}
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