position

Returns first starting index of the specified substring within string, or zero if it's not present.

English manual coverage begins with PostgreSQL 7.1. Source history and runtime observations have their own recorded version boundaries.

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group: string
group label: 字符串函数和操作符
lang: en
layout: table-new
pages: functions-string.html, functions-binarystring.html, functions-bitstring.html
prose only: false

Definition PG 18

Returns first starting index of the specified substring within string, or zero if it's not present.

Signatures and overloads

position ( substring text IN string text ) → integer → integer

Returns first starting index of the specified substring within string, or zero if it's not present.

position ( substring bytea IN bytes bytea ) → integer → integer

Returns first starting index of the specified substring within bytes, or zero if it's not present.

position ( substring bit IN bits bit ) → integer → integer

Returns first starting index of the specified substring within bits, or zero if it's not present.

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Complete source facts

documentation revision

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Source references

Original manual reference

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · wiki-repair-20261023:6cae337eb7b55b2207a226793152d0815b72fe917acfb625dc978b7ebed07363

Text language: en · wiki-repair-20261023:6cae337eb7b55b2207a226793152d0815b72fe917acfb625dc978b7ebed07363